Vendor, Fort Worth, TX
HRK Enterprises, Inc.
UEI RJ8AAPBH4775, CAGE 1HS77
118 awards and -$689,493 obligated between January 4, 2024 and February 20, 2026, 5% under full and open competition, against 4.1 offers on average where reported. 5 of the awards trace back to a SAM.gov solicitation on this site.
Sells to
Awarding agencies by dollars.
| Defense Contract Management Agency | $0 |
| Defense Logistics Agency | -$689,493 |
Industries
NAICS on the awards, by dollars.
| Powder Metallurgy Part ManufacturingNAICS 332117 | $20,400 |
| Plastics Pipe and Pipe Fitting ManufacturingNAICS 326122 | $0 |
| Hardware ManufacturingNAICS 332510 | $0 |
| Machine ShopsNAICS 332710 | $0 |
| Aircraft ManufacturingNAICS 336411 | $0 |
| Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment ManufacturingNAICS 336419 | $0 |
| Nonferrous ForgingNAICS 332112 | -$1,800 |
| Small Arms, Ordnance, and Ordnance Accessories ManufacturingNAICS 332994 | -$2,390 |
| Bolt, Nut, Screw, Rivet, and Washer ManufacturingNAICS 332722 | -$8,450 |
| Military Armored Vehicle, Tank, and Tank Component ManufacturingNAICS 336992 | -$10,108 |
How it wins
Awards by competition, set-aside and type.
| Competed Under SAP | 112 |
| Full and Open Competition After Exclusion of Sources | 6 |
| Small Business Set Aside - Total | 25 |
| Purchase Order | 61 |
| Delivery Order | 46 |
Solicitations it won
SAM.gov opportunities whose award USAspending attributes to this vendor.
- STRIP,TAIL ROTOR
Defense Logistics Agency, DLA Aviation
Award noticeNAICS 336411Fort Worth, TXSPE4A725T3889Awarded to HRK Enterprises, Inc. for $44,020
Posted Dec 11, 20242 publications - ADAPTER,HOISTING
Defense Logistics Agency, DLA Troop Support
Award noticeSmall businessNAICS 336413Fort Worth, TXSPE8EE24T1524Awarded to HRK Enterprises, Inc. for $90,100
Posted Jul 1, 20242 publications - FITTING,GAUGE AND V
Defense Logistics Agency, DLA Aviation
Award noticeNAICS 336413SPE4A724RX246Awarded to HRK Enterprises, Inc. for $250,000
Posted Feb 23, 2024
Awards
The 100 largest of 118 awards, by dollars obligated.
| Contract | Awarding office | Described as | Obligated |
|---|---|---|---|
| SPE8EF24P0267Purchase Order, January 18, 2024, Competed Under SAP, 21 offers | DLA Troop SupportDefense Logistics Agency | 8510391682!extension,aircraftNAICS 336413, PSC 1730 | $21,103 |
| SPE8EF25V0190Purchase Order, December 16, 2024, Competed Under SAP, 1 offers | DLA Troop SupportDefense Logistics Agency | 8511080413!adapter Assy,infrarNAICS 332117, PSC 1730 | $20,400 |
| SPE8EF24P0351Purchase Order, February 28, 2024, Competed Under SAP, 2 offers | DLA Troop SupportDefense Logistics Agency | 8510469004!rigging Set,flightNAICS 333519, PSC 1730 | $12,600 |
| SPE8E924P0987Purchase Order, September 17, 2024, Competed Under SAP, 2 offers | DLA Troop SupportDefense Logistics Agency | 8510886811!support,aircraft BoNAICS 336413, PSC 1730 | $7,000 |
| SPE4A624F8072Delivery Order, February 15, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510448603!block Assembly,secuNAICS 336415, PSC 1440 | $468 |
| SPE4A624PM453Purchase Order, April 23, 2024, Competed Under SAP, 2 offers | DLA AviationDefense Logistics Agency | 8510588591!adapter XMSN MountNAICS 336413, PSC 4920 | $400 |
| SPE4A724PB962Purchase Order, May 17, 2024, Competed Under SAP, 2 offers | DLA AviationDefense Logistics Agency | 8510643116!stop,blockNAICS 336413, PSC 1560 | $396 |
| SPE4A417V3053Purchase Order, July 8, 2025, Competed Under SAP, 10 offers | DLA AviationDefense Logistics Agency | 8504027779!latch AssemblyNAICS 332510, PSC 1440 | $0 |
| SPE4A524P6153Purchase Order, April 30, 2024, Competed Under SAP, 2 offers | DLA AviationDefense Logistics Agency | 8510592114!adapter,auxillaryNAICS 336413, PSC 4920 | $0 |
| SPE4A624F037SDelivery Order, April 9, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510557684!housing,dampener,laNAICS 336419, PSC 1440 | $0 |
| SPE4A624F348FDelivery Order, August 16, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510828925!block Assembly,secuNAICS 336415, PSC 1440 | $0 |
| SPE4A624F431DDelivery Order, September 13, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510890617!block Assembly,secuNAICS 336415, PSC 1440 | $0 |
| SPE4A624F6664Delivery Order, January 12, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510382102!jack,leveling-SuppoNAICS 336992, PSC 5120 | $0 |
| SPE4A624F7083Delivery Order, January 23, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510398496!housing,dampener,laNAICS 336419, PSC 1440 | $0 |
| SPE4A624F8084Delivery Order, February 15, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510448595!jack,leveling-SuppoNAICS 336992, PSC 5120 | $0 |
| SPE4A624F9636Delivery Order, March 14, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510509250!housing,dampener,laNAICS 336419, PSC 1440 | $0 |
| SPE4A624F9660Delivery Order, March 15, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510510864!block Assembly,secuNAICS 336415, PSC 1440 | $0 |
| SPE4A624PP767Purchase Order, May 20, 2024, Competed Under SAP, 2 offers | DLA AviationDefense Logistics Agency | 8510644031!adapter,auxillaryNAICS 336413, PSC 4920 | $0 |
| SPE4A625F0016Delivery Order, October 1, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510928511!block Assembly,secuNAICS 336415, PSC 1440 | $0 |
| SPE4A625F0315Delivery Order, October 9, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510945926!housing,dampener,laNAICS 336419, PSC 1440 | $0 |
| SPE4A625F2230Delivery Order, November 14, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8511015727!jack,leveling-SuppoNAICS 336992, PSC 5120 | $0 |
| SPE4A625F6010Delivery Order, January 16, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8511126878!jack,leveling-SuppoNAICS 336992, PSC 5120 | $0 |
| SPE4A625P9420Purchase Order, December 14, 2024, Competed Under SAP, 4 offers | DLA AviationDefense Logistics Agency | 8511076934!adapter,auxillaryNAICS 336413, PSC 4920 | $0 |
| SPE4A625P9667Purchase Order, December 23, 2024, Competed Under SAP, 4 offers | DLA AviationDefense Logistics Agency | 8511082301!guide Assembly,sealNAICS 336413, PSC 4920 | $0 |
| SPE4A716M6063Purchase Order, July 8, 2025, Competed Under SAP, 13 offers | DLA AviationDefense Logistics Agency | 8503008811!handle,armored WingNAICS 336413, PSC 1560 | $0 |
| SPE4A721V0680Purchase Order, July 10, 2025, Competed Under SAP, 7 offers | DLA AviationDefense Logistics Agency | 8507890993!washer,lock Assy,drNAICS 336413, PSC 1620 | $0 |
| SPE4A724F057RDelivery Order, September 13, 2024, Full and Open Competition After Exclusion of Sources | DLA AviationDefense Logistics Agency | 8510890799!valve Assy,air-DuctNAICS 336413, PSC 1560 | $0 |
| SPE4A724F3094Delivery Order, April 1, 2025, Full and Open Competition After Exclusion of Sources, 4 offers | DLA AviationDefense Logistics Agency | 8510337013!strip,tail RotorNAICS 336411, PSC 1615 | $0 |
| SPE4A724F4541Delivery Order, January 30, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510401639!rail,aircraft SeatNAICS 336413, PSC 1680 | $0 |
| SPE4A724F5509Delivery Order, February 26, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510467996!strip,wearNAICS 336413, PSC 1560 | $0 |
| SPE4A724F5847Delivery Order, March 14, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510503676!rail,aircraft SeatNAICS 336413, PSC 1680 | $0 |
| SPE4A724F6592Delivery Order, March 25, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510527836!rail,aircraft SeatNAICS 336413, PSC 1680 | $0 |
| SPE4A724F9481Delivery Order, July 19, 2024, Full and Open Competition After Exclusion of Sources | DLA AviationDefense Logistics Agency | 8510761995!valve Assy,air-DuctNAICS 336413, PSC 1560 | $0 |
| SPE4A724P7110Purchase Order, February 6, 2024, Competed Under SAP, 5 offers | DLA AviationDefense Logistics Agency | 8510428246!padxassy,droopNAICS 336411, PSC 1615 | $0 |
| SPE4A724PA099Purchase Order, May 2, 2024, Competed Under SAP, 4 offers | DLA AviationDefense Logistics Agency | 8510564419!protractor, Tool SetNAICS 336413, PSC 4920 | $0 |
| SPE4A725F0177Delivery Order, October 18, 2024, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510951915!plug Assy,axle,mainNAICS 336413, PSC 1620 | $0 |
| SPE4A725F2139Delivery Order, December 12, 2024, Full and Open Competition After Exclusion of Sources | DLA AviationDefense Logistics Agency | 8511072021!valve Assy,air-DuctNAICS 336413, PSC 1560 | $0 |
| SPE4A725F2648Delivery Order, January 2, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8511104202!strip,wearNAICS 336413, PSC 1560 | $0 |
| SPE4A725F2952Delivery Order, January 16, 2025, Full and Open Competition After Exclusion of Sources | DLA AviationDefense Logistics Agency | 8511126627!valve Assy,air-DuctNAICS 336413, PSC 1560 | $0 |
| SPE4A725F5172Delivery Order, April 8, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8511303184!plug Assy,axle,mainNAICS 336413, PSC 1620 | $0 |
| SPE4A725P0984Purchase Order, October 21, 2024, Competed Under SAP, 2 offers | DLA AviationDefense Logistics Agency | 8510962457!rod,pilots Window PNAICS 336413, PSC 1560 | $0 |
| SPE4A725P2808Purchase Order, December 4, 2024, Competed Under SAP, 1 offers | DLA AviationDefense Logistics Agency | 8511051663!strip,tail RotorNAICS 336411, PSC 1615 | $0 |
| SPE4A725P3023Purchase Order, December 11, 2024, Competed Under SAP, 1 offersSolicitation | DLA AviationDefense Logistics Agency | 8511062745!strip,tail RotorNAICS 336411, PSC 1615 | $0 |
| SPE7L322P6391Purchase Order, January 4, 2024, Competed Under SAP, 3 offers | DLA Land and MaritimeDefense Logistics Agency | 8509194546!lever,manual ControNAICS 333613, PSC 3040 | $0 |
| SPE7M425P1469Purchase Order, December 20, 2024, Competed Under SAP, 2 offers | DLA Land and MaritimeDefense Logistics Agency | 8511091869!tube Assembly,metalNAICS 326122, PSC 4710 | $0 |
| SPE8E924V1434Purchase Order, April 15, 2024, Competed Under SAP, 5 offers | DLA Troop SupportDefense Logistics Agency | 8510572774!mount,track,retractNAICS 336413, PSC 1730 | $0 |
| SPE8EE24P0665Purchase Order, July 1, 2024, Competed Under SAP, 7 offersSolicitation | DLA Troop SupportDefense Logistics Agency | 8510688824!adapter,hoistingNAICS 336413, PSC 3940 | $0 |
| SPE8EF22P0192Purchase Order, June 24, 2024, Competed Under SAP, 2 offers | DCMA SouthDefense Contract Management Agency | 8508803096!pin,ground SafetyNAICS 336413, PSC 1730 | $0 |
| SPE8EF24P0594Purchase Order, June 12, 2024, Competed Under SAP, 4 offers | DLA Troop SupportDefense Logistics Agency | 8510692343!adapter,aircraft JaNAICS 336413, PSC 1730 | $0 |
| SPE8EF24V0180Purchase Order, January 9, 2024, Competed Under SAP, 5 offers | DLA Troop SupportDefense Logistics Agency | 8510374625!PIN Assy,riggingNAICS 336413, PSC 1730 | $0 |
| SPE8EF24V0181Purchase Order, January 9, 2024, Competed Under SAP, 3 offers | DLA Troop SupportDefense Logistics Agency | 8510374712!pin,warning StreameNAICS 336413, PSC 1730 | $0 |
| SPRRA124F0159Delivery Order, August 15, 2024, Competed Under SAP | DLA Aviation at Huntsville, AlDefense Logistics Agency | Spares Do NSN 4920-01-108-3484NAICS 332710, PSC 4920 | $0 |
| SPE4A620D5067May 16, 2024, Competed Under SAP, 1 offers | DLA AviationDefense Logistics Agency | 4610051321!block Assembly,secuNAICS 336415, PSC 1440 | $0 |
| SPE4A620D5181May 16, 2024, Competed Under SAP, 1 offers | DLA AviationDefense Logistics Agency | 4610052172!housing,dampener,laNAICS 336419, PSC 1440 | $0 |
| SPE4A623D5238May 20, 2024, Competed Under SAP, 3 offers | DLA AviationDefense Logistics Agency | 4610096543!jack,leveling-SuppoNAICS 336992, PSC 5120 | $0 |
| SPE4A623D5B36May 3, 2024, Competed Under SAP, 2 offers | DLA AviationDefense Logistics Agency | 4610103329!magnet AssemblyNAICS 336415, PSC 1440 | $0 |
| SPE4A720D5071May 20, 2024, Competed Under SAP, 2 offers | DLA AviationDefense Logistics Agency | 4610051789!cap,end,launcherNAICS 336415, PSC 1440 | $0 |
| SPE4A720D5177February 15, 2024, Competed Under SAP, 2 offers | DLA AviationDefense Logistics Agency | 4610052943!strip,wearNAICS 336413, PSC 1560 | $0 |
| SPE4A720D5675May 17, 2024, Competed Under SAP, 3 offers | DLA AviationDefense Logistics Agency | 4610061229!rail,aircraft SeatNAICS 336413, PSC 1680 | $0 |
| SPE4A722D5267May 20, 2024, Competed Under SAP, 3 offers | DLA AviationDefense Logistics Agency | 4610088575!plug Assy,axle,mainNAICS 336413, PSC 1620 | $0 |
| SPE4A722D5337May 20, 2024, Competed Under SAP, 2 offers | DLA AviationDefense Logistics Agency | 4610089678!support,structuralNAICS 336413, PSC 1560 | $0 |
| SPE4A723D0266May 20, 2024, Full and Open Competition After Exclusion of Sources, 2 offers | DLA AviationDefense Logistics Agency | 4610102769!valve Assy,air-DuctNAICS 336413, PSC 1560 | $0 |
| SPE4A724D5187February 23, 2024, Competed Under SAP, 4 offersSolicitation | DLA AviationDefense Logistics Agency | 4610109274!fitting,gauge and VNAICS 336413, PSC 1620 | $0 |
| SPE4A617P2764Purchase Order, October 20, 2025, Competed Under SAP, 4 offers | DLA AviationDefense Logistics Agency | 8503840324!stiffener,collectorNAICS 336415, PSC 1440 | -$950 |
| SPE4A718P8449Purchase Order, February 20, 2026, Competed Under SAP, 6 offers | DLA AviationDefense Logistics Agency | 8505347063!retainer-Base RunneNAICS 336413, PSC 1680 | -$950 |
| SPE8E922P0734Purchase Order, November 26, 2024, Competed Under SAP, 9 offers | DLA Troop SupportDefense Logistics Agency | 8508968905!NAICS 336413, PSC 1730 | -$1,260 |
| SPE4A722F0862Delivery Order, May 20, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8508600348!rail,aircraft SeatNAICS 336413, PSC 1680 | -$1,460 |
| SPE8E423P7021Purchase Order, June 13, 2024, Competed Under SAP, 2 offers | DLA Troop SupportDefense Logistics Agency | 8510057955!NAICS 332112, PSC 9540 | -$1,800 |
| SPE4A723F5450Delivery Order, April 1, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8509745270!beam Assy,doorNAICS 336413, PSC 1560 | -$1,872 |
| SPE4A623F357XDelivery Order, April 1, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510086817!NAICS 336415, PSC 1440 | -$2,384 |
| SPE7L024P0534Purchase Order, July 29, 2024, Competed Under SAP, 2 offers | DLA Land and MaritimeDefense Logistics Agency | 8510360085!NAICS 332994, PSC 1015 | -$2,390 |
| SPE8E923V1515Purchase Order, July 30, 2024, Competed Under SAP, 4 offers | DLA Troop SupportDefense Logistics Agency | 8509869133!rod,lock,shift LeveNAICS 336413, PSC 1730 | -$2,465 |
| SPE4A524P1487Purchase Order, October 21, 2025, Competed Under SAP, 6 offers | DLA AviationDefense Logistics Agency | 8510270117!NAICS 336413, PSC 4920 | -$2,790 |
| SPE4A523P4336Purchase Order, May 28, 2024, Competed Under SAP, 6 offers | DLA AviationDefense Logistics Agency | 8509971073!guide Assembly,sealNAICS 336413, PSC 4920 | -$3,400 |
| SPE4A722F027CDelivery Order, August 22, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8509187210!NAICS 336413, PSC 1560 | -$3,500 |
| SPE4A722F081XDelivery Order, August 22, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8509298340!NAICS 336413, PSC 1560 | -$3,500 |
| SPE4A722F124EDelivery Order, August 22, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8509385343!NAICS 336413, PSC 1560 | -$3,500 |
| SPE4A722F3365Delivery Order, August 22, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8508730287!NAICS 336413, PSC 1560 | -$3,500 |
| SPE4A722F7699Delivery Order, August 22, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8509000644!NAICS 336413, PSC 1560 | -$3,500 |
| SPE4A723F1363Delivery Order, August 22, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8509525056!NAICS 336413, PSC 1560 | -$3,600 |
| SPE4A723F6989Delivery Order, April 1, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8509819462!NAICS 336413, PSC 1560 | -$3,600 |
| SPE4A524P2169Purchase Order, May 30, 2024, Competed Under SAP, 2 offers | DLA AviationDefense Logistics Agency | 8510302544!adapter,auxillaryNAICS 336413, PSC 4920 | -$3,750 |
| SPE4A722F9774Delivery Order, September 11, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8509133076!NAICS 336413, PSC 1560 | -$3,750 |
| SPE8EF22P0555Purchase Order, February 4, 2025, Competed Under SAP, 6 offers | DLA Troop SupportDefense Logistics Agency | 8509205498!NAICS 336413, PSC 1730 | -$3,824 |
| SPE4A622P2781Purchase Order, May 9, 2024, Competed Under SAP, 4 offers | DLA AviationDefense Logistics Agency | 8508646871!NAICS 334419, PSC 4920 | -$4,000 |
| SPE4A722F8237Delivery Order, February 18, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8509030998!NAICS 336413, PSC 1680 | -$4,108 |
| SPE4A723F1568Delivery Order, May 20, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8509535504!NAICS 336413, PSC 1680 | -$4,607 |
| SPE8E921P1146Purchase Order, November 26, 2024, Competed Under SAP, 12 offers | DLA Troop SupportDefense Logistics Agency | 8508231716!NAICS 336413, PSC 1730 | -$5,054 |
| SPE8EF23V0522Purchase Order, February 26, 2025, Competed Under SAP, 1 offers | DLA Troop SupportDefense Logistics Agency | 8510026769!NAICS 336413, PSC 1730 | -$5,236 |
| SPE4A722P7230Purchase Order, April 26, 2024, Competed Under SAP, 7 offers | DLA AviationDefense Logistics Agency | 8508951792!strut Assy,tail RotNAICS 336413, PSC 1560 | -$5,400 |
| SPE8EF24V0020Purchase Order, February 9, 2026, Competed Under SAP, 3 offers | DLA Troop SupportDefense Logistics Agency | 8510202004!bracket,rod,tilt CyNAICS 336413, PSC 1730 | -$6,006 |
| SPE4A123P1245Purchase Order, May 28, 2024, Competed Under SAP, 1 offers | DLA AviationDefense Logistics Agency | 8509954332!adapter,auxillaryNAICS 336413, PSC 4920 | -$7,450 |
| SPE4A723P6348Purchase Order, May 28, 2024, Competed Under SAP, 4 offers | DLA AviationDefense Logistics Agency | 8509702807!lever,remote ControNAICS 336413, PSC 1680 | -$7,470 |
| SPE4A723PE581Purchase Order, April 1, 2025, Competed Under SAP, 2 offers | DLA AviationDefense Logistics Agency | 8510106075!NAICS 336413, PSC 1620 | -$8,380 |
| SPE7L123P9624Purchase Order, November 25, 2024, Competed Under SAP, 2 offers | DLA Land and MaritimeDefense Logistics Agency | 8510162695!NAICS 332722, PSC 5340 | -$8,450 |
| SPE4A722PF472Purchase Order, May 20, 2025, Competed Under SAP, 5 offers | DLA AviationDefense Logistics Agency | 8509379367!NAICS 336413, PSC 1680 | -$8,580 |
| SPE4A722P2797Purchase Order, April 26, 2024, Competed Under SAP, 9 offers | DLA AviationDefense Logistics Agency | 8508722173!NAICS 336413, PSC 1560 | -$9,000 |
| SPE4A624F0761Delivery Order, April 4, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8510207235!NAICS 336992, PSC 5120 | -$10,108 |
| SPE4A623F0222Delivery Order, April 1, 2025, Competed Under SAP | DLA AviationDefense Logistics Agency | 8509451705!NAICS 336415, PSC 1440 | -$10,626 |
| SPE8E923V0758Purchase Order, January 14, 2025, Competed Under SAP, 3 offers | DLA Troop SupportDefense Logistics Agency | 8509659116!NAICS 336412, PSC 1730 | -$10,695 |
- Product and service codes
- 1615 Helicopter Rotor Blades, Drive Mechanisms and Components4710 Pipe, Tube and Rigid Tubing9540 Structural Shapes, Nonferrous Base Metal1015 Guns, 75 mm through 125 mm5340 Hardware5120 Hand Tools, Nonedged, Nonpowered
- Transactions
- 180 across 118 awards