# JASC 2900: Hydraulic Power System

- Type: JASC system/component code (FAA)
- ATA chapter: 29 Hydraulic Power
- Title in the code table: HYDRAULIC POWER SYSTEM
- Service difficulty reports: 333
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=28
- Page: https://openairdocs.org/jasc/2900

## What it covers

The units and components that furnish hydraulic fluid under pressure to a common point (manifold) for re-distribution to other defined systems. For miscellaneous system parts other than components listed under other specific JASC Chapter 29 codes. Also, for reports of units or parts common to two or more components.

## Service difficulty reports (333, newest 50)

- [SDR CALA2026090919339](https://openairdocs.org/sdr/CALA2026090919339), Sep 8, 2026: Boeing 7379. SUMP. LEAKING. WHILE SHUTDOWN AT GATE NR 1 ENGINE HAS MIST COMING FROM ENGINE I NLET AND SMELLS OF HYDRAULIC. ENGINE RUN CHECKLIST UPLO (N37538)
- [SDR SWIA2026090177072](https://openairdocs.org/sdr/SWIA2026090177072), Sep 1, 2026: Cndair CL6002C10. CONTROL UNIT. FAULTED. CREW REPORTED HYD 3 LO PRESS INFLIGHT AND LOSS OF ALL HYD 3 FLUID PUMP 3A RAN FOR APPROXIMATELY 5 MINUTES PUMP 3B RAN FO (N766SK)
- [SDR YENA2026060100497](https://openairdocs.org/sdr/YENA2026060100497), May 30, 2026: Airbus A321271NX. GAUGE. MISSING. FLT # 32, AMS-BOS. (ETOPS) "FOUND GREEN HYD ACCUMULATOR ON WALK AROUND.; R /R GREEN HYD SYSTEM NITRO GEN PRESS GAUGE IAW (N4062J)
- [SDR R61A2026052300144](https://openairdocs.org/sdr/R61A2026052300144), May 23, 2026: Emb ERJ170100SE. HYDRAULIC LINE. LEAKING. HYD 2 LOW QTY MSG. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. REMOVED AND REPLACED #2 HYD PRESSURE LINE. (N865RW)
- [SDR R61A2026031200059](https://openairdocs.org/sdr/R61A2026031200059), Mar 12, 2026: Emb ERJ170200LR. WARNING MESSAGE. FALSE ACTIVATION. HYD 2 LO PRESS DURING CRUISE. MESSAGE EXTINGUISHER AFTER 5-10 SECONDS. QTY 50% PRESS IS AMBER DASHES. DECLARED EMERGENCY (N747YX)
- [SDR DALA2026011200251](https://openairdocs.org/sdr/DALA2026011200251), Jan 9, 2026: Airbus A330941. CONTROLLER. FAULTED. DUE TO HYD B PRESS LOW AND LO LVL ECAM MESSAGE. REPLACED PUA FIN 5240JM ALONG WITH THE RELIEF VALVE AND CHECK VALVE IN B (N402DX)
- [SDR DALA2025111008219](https://openairdocs.org/sdr/DALA2025111008219), Nov 10, 2025: Boeing 737832. SHUTOFF VALVE. BYPASSING. DECLARED EMERGENCY AND DIVERTED TO ONT DUE TO FLT CONTROL 'B' LOW PRESSURE LIGHT ILLUMINATED. FOUND SYSTEM 'B' FLIGHT CO (N399DA)
- [SDR IPXA2025082834493](https://openairdocs.org/sdr/IPXA2025082834493), Aug 12, 2025: Airbus A300F4622R. HYDRAULIC SYSTEM. LEAKING. FWD CARGO COMPARTMENT CENTER BILLIAGE AREA INSULATION SATURATED WITH SKYDROLL. CLEANED UNDER FWD CARGO BILLIAGE AREA FRO (N140UP)
- [SDR HALA20250721221](https://openairdocs.org/sdr/HALA20250721221), Jul 19, 2025: Boeing 7879. HYDRAULIC SYSTEM. FAULTED. ATB - SHORTLY AFTER TAKEOFF HYD PUMP C1. PER FIM 24-00-F9-DRA-421A, FOUND EVIDENCE OF DAMAGE ON LEFT-1 ATRU. REPLACED LE (N780HA)
- [SDR AALA202501136707](https://openairdocs.org/sdr/AALA202501136707), Jan 12, 2025: Boeing 737823. HYDRAULIC SYSTEM. FAULTED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: ENGINE NUMBER 2 HYDRAULIC LOW PRESSURE AMBER CAUTION ILLUMINATE (N338RS)
- [SDR DXTA2025011301927](https://openairdocs.org/sdr/DXTA2025011301927), Jan 11, 2025: Cessna 680A. SCREW. LOOSE. HYDRAULIC SYSTEM PRESSURE INDICATION: DURING DESCENT INTO IAD AT 29,000', WE NOTICED THAT HYDRAULIC PRESSURE BEGAN TO FL (N591QS)
- [SDR CALA2025010901844](https://openairdocs.org/sdr/CALA2025010901844), Jan 8, 2025: Boeing 7378. CAP. MISSING. LEFT HYDRAULIC PRESSURIZATION MULE FITTING COUPLINGS DUST CAPS ARE NOT INSTALLED. INSTALLED DUST CAPS ON LEFT HYDRAULIC  (N27252)
- [SDR ABXA20241215258](https://openairdocs.org/sdr/ABXA20241215258), Dec 15, 2024: Boeing 767338. CONTROL UNIT. MALFUNCTIONED. DURING TAXI OUT C HYD PRIMARY 1 EICAS MESSAGE APPEARED , AC RETURNED TO GATE (BTB) AND MTX GROUNDED AC . TROUBLESHOT, AN (N364CM)
- [SDR AALA202411146201](https://openairdocs.org/sdr/AALA202411146201), Nov 14, 2024: Airbus A321231. HYDRAULIC SYSTEM. WARNING MESSAGE. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO ATL DUE TO THE FLIGHT CREW REPORTING YELLO (N140AN)
- [SDR CALA2024111101090](https://openairdocs.org/sdr/CALA2024111101090), Nov 11, 2024: Airbus A320232. VALVE. LEAKING. FLUID RUNNING DOWN AFTBELLY BELOW CARGO DOOR PER AMM 29-00-00-790-001-A 10 DROPS PER MINUTE IS GOOD SUSPECT DOOR CONTROL (N459UA)
- [SDR CALA2024110400996](https://openairdocs.org/sdr/CALA2024110400996), Nov 1, 2024: Airbus A320232. DRAIN LINE. LEAKING. LOSS OF GREEN HYD QTY RESULTED IN ECAM HYD G RSVR LO LVL. FOUND CRACK ON NUMBER ONE ENG RETURN LINE FROM THRUST REVERSER (N487UA)
- [SDR BAGA2024FA0000631](https://openairdocs.org/sdr/BAGA2024FA0000631), Aug 19, 2024: Airbus BD5001A11. HYDRAULIC SYSTEM. INDICATION. HYD 1 LO QTY HYD 0%. SYSTEM 1 INDICATED 3200 PSI DURING ENTIRE EVENT UNTIL MANUAL SYSTEM SHUTDOWN AT GATE. NO LOSS OF SY (N208BZ)
- [SDR CALA2024080800391](https://openairdocs.org/sdr/CALA2024080800391), Aug 6, 2024: Boeing 737724. HYDRAULIC SYSTEM. ABNORMAL. RETURN TO IAH DUE TO SUSPECTED HYD A LEAK LOSING 1 PERCENT EVERY 12 MIN. CURRENT 61 PER PERFORMED LANDING GEAR EXTENTION (N16732)
- [SDR 3EJA202407110001](https://openairdocs.org/sdr/3EJA202407110001), Jul 11, 2024: Cessna 560XL. WARNING LIGHT. ILLUMINATED. WHILE CLIMBING THROUGH APPROXIMATELY 24,500 FEET WE OBSERVED THE MASTER WARNING LIGHT ACTIVATED ALONG WITH THE HYD PRESS (N846JS)
- [SDR ABXA20240703130](https://openairdocs.org/sdr/ABXA20240703130), Jul 3, 2024: Boeing 767281. MODULE. LEAKING. COMPLETED ENGINE START CHECKLIST, GROUND CREW SAW HYDRAULIC LEAK. EICAS STATUS PG. HYDRAULIC CETER QUANTITY AT 0.58 ENGI (N783AX)
- [SDR GTIA2024062038188](https://openairdocs.org/sdr/GTIA2024062038188), Jun 19, 2024: Airbus A320271N. ACTUATOR. FALSE INDICATION. RAT OUT DISPLAYED ON ECAM, RETURNED TO FLL-IAW TSM 29-22-00-810-801A PARA 4.B.1 FAULT CLEARED WHEN PINS B/C CONNECTED AT (N923NK)
- [SDR CALA2024043001275](https://openairdocs.org/sdr/CALA2024043001275), Apr 25, 2024: Boeing 767322. SWITCH. FAULTY. CREW REPORTED ON APPROACH TO MUC, FLT HAD TO ACP GO-AROUND. DURING FLAP AND GEAR RETRACTION, CTR HYD DEMAND PUMP LOW PRE (N659UA)
- [SDR YENA2024041500518](https://openairdocs.org/sdr/YENA2024041500518), Apr 14, 2024: Airbus A321271N. RAM AIR TURB. FAULTED. FLT#1620,BOS-LHR. (ETOPS) 'HYD RAT FAULT ECAM; REPLACED PRESSURE SWITCH ON RAT IAW AMM 29-22-53 OPS CHECKS GOOD.' (N4074J)
- [SDR CALA2024041501086](https://openairdocs.org/sdr/CALA2024041501086), Apr 11, 2024: Airbus A320232. DRAIN LINE. DAMAGED. HYD Y RSVR LO LVL UPDATED MAA CODE FIX USING VENDOR MAA SCREEN PLEASE CONTACT TOMC BEFORE COMMENCING ANY WORK. INSPECTED (N437UA)
- [SDR CALA2024040901011](https://openairdocs.org/sdr/CALA2024040901011), Apr 1, 2024: Boeing 767324. TRANSMITTER. INTERMITTENT. REJECTED T/O FOR R HYD QTY EICAS MSG. AFTER CLEARING RWY R HYD Q TY DECREASED TO 0.00 REQUEST MEL 2933E VERIFIED RIGHT H (N685UA)
- [SDR CALA2024030600644](https://openairdocs.org/sdr/CALA2024030600644), Mar 2, 2024: Boeing 75733N. TRANSMITTER. INTERMITTENT. MAIN LT, RT, AND CNTR C HYD QTY DECREASED. QTY STABLE WITH SYS PUMPS OFF QTY DECREASED TO 0.02. FLUTUATED W/PUMPS ON STA (N57869)
- [SDR CALA2024010400019](https://openairdocs.org/sdr/CALA2024010400019), Dec 31, 2023: Boeing 737824. FITTING. DAMAGED. LOSS OF HYD A QTY IN FLT GEAR SUCCESSFULLY MANUALLY EXTENDED. TASK 29-11-00-860-805, TASK 29-09-00-860-802. CONNECTION B (N12216)
- [SDR YENA2023111501389](https://openairdocs.org/sdr/YENA2023111501389), Nov 13, 2023: Airbus A320232. UNKNOWN. UNKNOWN. FLT#261, BOS-SJU. (AIRCRAFT DECLARED AN EMERGENCY INTO SJU) 'HYD G RSVR LO LVL HYD G RSVR LO PR.' (SUPPLEMENTAL INFORMAT (N621JB)
- [SDR 4DPA2023111000001](https://openairdocs.org/sdr/4DPA2023111000001), Nov 10, 2023: Emb EMB145LR. FITTING. LEAKING. CREW REPORTED #1 HYD SYSTEM SLOW LEAK BASED ON LEVEL CARROT DROPPING IN FLIGHT. CORR ACTION; TROUBLESHOT TO HYD FITTING  (N242JX)
- [SDR CALA2023103003214](https://openairdocs.org/sdr/CALA2023103003214), Oct 28, 2023: Boeing 757324. TRANSMITTER. UNKNOWN. T/O +15 MIN C HYD QTY AND RSVR LTS. .01 QTYRF INDICATED. AFTER TURNING OFF CTR PUMPS QTY INCR REPLACED CENTER HYDRAULIC  (N57869)
- [SDR AALA202310234613](https://openairdocs.org/sdr/AALA202310234613), Oct 20, 2023: Boeing 737823. TRANSMITTER. FAULTY. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO SJU DUE TO HYDRAULIC SYSTEM A QUANTITY LEV (N314RH)
- [SDR JIKA2023100901](https://openairdocs.org/sdr/JIKA2023100901), Oct 9, 2023: Beech C99. MOTOR. FAILED. PILOT REPORTED THAT ON LANDING, THE GEAR DOWN SELECTION FAILED WHEN ACTUATED. HE THEN EXERCISED THE EMERGENCY LANDING GE (N68TA)
- [SDR YENA2023100901205](https://openairdocs.org/sdr/YENA2023100901205), Oct 7, 2023: Airbus A321231. UNKNOWN. UNKNOWN. FLT#861, BOS-SJU. (AIRCRAFT PERFORMED AN AIR TURN BACK TO BOS) 'BLUE HYDRAULIC SYSTEM QUANTITY INDICATES BELOW NORMAL FI (N949JT)
- [SDR UIEA2023090800828](https://openairdocs.org/sdr/UIEA2023090800828), Sep 7, 2023: Boeing 74746NF. UNKNOWN. UNKNOWN. #1 HYD QUANTITY DROPPING(<P>LOCATED LEAK OF HYDRAULIC LINE AT STA 900. REPAIRED PER GMM 3.24.1 USING A NEW SECTION OF PI (N452PA)
- [SDR CALA2023090802741](https://openairdocs.org/sdr/CALA2023090802741), Sep 5, 2023: Boeing 757200. ACCUMULATOR. UNKNOWN. HYDRAULIC MOTOR GENERATOR ACCUMULATOR GAUGE IS AT "0" PSI IN THE HYDRAULICS BAY ACCESS. PLEASE SEE ATTACHED PICTURES. HY (N13113)
- [SDR F3LA2023000500153](https://openairdocs.org/sdr/F3LA2023000500153), Sep 2, 2023: Airbus A320251N. FITTING. CRACKED. DISCREPANCY: REFERENCE LP318523 AIRCRAFT TAKEN OUT OF SERVICE FLIGHT #503. HYD G RSVR LO LVL. CORRECTIVE ACTION: REMOVED (N350FR)
- [SDR F3LA2023083000152](https://openairdocs.org/sdr/F3LA2023083000152), Aug 29, 2023: Airbus A320251N. UNKNOWN. UNKNOWN. IN FLT AR ROUGHLY 0800 FEET ECAM HYD Y ENG 2 PUMP LO PR - OPEN (N350FR)
- [SDR FDEA202308241484](https://openairdocs.org/sdr/FDEA202308241484), Aug 24, 2023: Boeing 757200. INDICATOR. FAILED. PDIS 953 29-02 8832 23AUG23 ROA OPEN U FIRST EICAS MESSAGE WAS L HYD QTY. RAN QRH 13.1.2. A FEW MOMENTS LATER EICAS MESS (N953FD)
- [SDR FDEA202308231478](https://openairdocs.org/sdr/FDEA202308231478), Aug 23, 2023: Airbus A300*. UNKNOWN. UNKNOWN. A/C CAME INTO BLOCKS WITH RAT DEPLOYED. BOTH HANDLES IN COCKPIT HAVE COPPER WIRE STILL INSTALLED. (N685FE)
- [SDR 9WGA2023082234401](https://openairdocs.org/sdr/9WGA2023082234401), Aug 22, 2023: Boeing 747446F. UNKNOWN. UNKNOWN. DISCREPANCY: AIR TURN BACK DUE TO LOSS OF #4 HYDRAULIC FLUID. 50% REDUCTION IN 2 HOURS OF FLIGHT. CORRECTIVE ACTION: UPO (N344KD)
- [SDR FDEA202308201465](https://openairdocs.org/sdr/FDEA202308201465), Aug 20, 2023: Airbus A300*. TRANSMITTER. FAILED. PDIS 676 29-01 2402 19AUG23 MEM OPEN U GREEN HYD RSVR LO LEVEL ECAM MESSAGE IN CRUISE. COMPLIED WITH ECAM AND QRH PROCED (N676FE)
- [SDR CALA2023082102609](https://openairdocs.org/sdr/CALA2023082102609), Aug 19, 2023: Boeing 737900ER. UNKNOWN. UNKNOWN. IN FLIGHT WE NOTICED HYD A QTY WAS DROPING, IT DROPPED TO 71 PERCENT. ACCORDING TO CAPT HYDRAULIC QUANTITY DROPED ON CRU (N69839)
- [SDR YENA2023082100962](https://openairdocs.org/sdr/YENA2023082100962), Aug 19, 2023: Airbus A320232. SAFETY VALVE. FAILED. FLT#2276, MCO-PVD. (AIRCRAFT PERFORMED AN AIR TURN BACK) ' GREEN HYDRAULIC FAILURE CLIMBING THRU 4,000 MANUAL GEAR EXTEN (N613JB)
- [SDR AALA202308170915](https://openairdocs.org/sdr/AALA202308170915), Aug 15, 2023: Airbus A320*. PACKING. TORN. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED UPON ARRIVAL TO DFW DUE TO A GREEN HYDRAULIC SYSTEM LOW LEVEL ECAM. THE (N163AA)
- [SDR GTIA2023080737400](https://openairdocs.org/sdr/GTIA2023080737400), Aug 7, 2023: Airbus A321231. RESERVOIR. OVERHEATED. 20 MIN AFTER T/O. HYD G RSVR OVERHEAT. PERFORMED ECAM ACTIONS 20MIN LATER OVERHEAT WENTAWAY PERCOM RECOVERD GREEN PUMP A (N671NK)
- [SDR GTIA2023080737394](https://openairdocs.org/sdr/GTIA2023080737394), Aug 6, 2023: Airbus A320271N. RESERVOIR. LOW. HYD G RSVR LO LVL-PERFORMED TROUBLESHOOTING IAW TSM 29-10-00-810-804-A. FOUND CASE DRAIN PYLON PIPE CHAFED ENG#1 LEAKING (N923NK)
- [SDR FDEA202307301335](https://openairdocs.org/sdr/FDEA202307301335), Jul 30, 2023: Airbus A300*. VALVE. FAILED. APPROACHING RWY23R KTYS FOR TAKEOFF, INDICATING SMOKE IN COURIER AREA. STOPPED ACFT. CONFIRMED SMOKE IN COURIER AREA. NO (N685FE)
- [SDR CALA2023073102390](https://openairdocs.org/sdr/CALA2023073102390), Jul 28, 2023: Airbus A320232. ACCUMULATOR. LEAKING. ECAM CAUTION MESSAGE - Y RSVR LO LVL MESSAGE INOP - HYD YELLOW SYS ACCUM LEAK. R&AMP;R YELLOW HYD ACC REF MM 29-13-42. O (N477UA)
- [SDR QMLA2023073120057](https://openairdocs.org/sdr/QMLA2023073120057), Jul 27, 2023: Pilats PC1247. UNKNOWN. UNKNOWN. EN ROUTE TO HOME STATION, THE HYDRAULIC CAWS LIGHT ILLUMINATED. QRH PROCEDURES WERE FOLLOWED AND THE LANDING GEAR WAS PU (N895CR)
- [SDR CALA2023073102389](https://openairdocs.org/sdr/CALA2023073102389), Jul 27, 2023: Boeing 767424ER. TUBE. LEAKING. HYD C QTY LOW LIGHT APPROX 1.0 AFTER T/O. FOUND HYDRAULIC QUANTITY LOW .23 ,PERFORMED EXTERNAL GVI FOUND SIGN OF LEAKAGE (N66057)

All 333: https://openairdocs.org/jasc/2900/reports.md

## Airworthiness concern sheets (1)

- [AIR760-2008-02-S-2900-ACS](https://openairdocs.org/acs/AIR760-2008-02-S-2900-ACS): Hydraulic Pump Case Drain Check Valve. Issued Feb 13, 2008

## Other codes in chapter 29

- [JASC 2910](https://openairdocs.org/jasc/2910): Hydraulic System, Main (11,280 reports)
- [JASC 2911](https://openairdocs.org/jasc/2911): Hydraulic Power Accumulator, Main (202 reports)
- [JASC 2912](https://openairdocs.org/jasc/2912): Hydraulic Filter, Main (201 reports)
- [JASC 2913](https://openairdocs.org/jasc/2913): Hydraulic Pump (Electric/Engine), Main (4,062 reports)
- [JASC 2914](https://openairdocs.org/jasc/2914): Hydraulic Handpump, Main (22 reports)
- [JASC 2915](https://openairdocs.org/jasc/2915): Hydraulic Pressure Relief Valve, Main (101 reports)
- [JASC 2916](https://openairdocs.org/jasc/2916): Hydraulic Reservoir, Main (385 reports)
- [JASC 2917](https://openairdocs.org/jasc/2917): Hydraulic Pressure Regulator, Main (65 reports)
- [JASC 2920](https://openairdocs.org/jasc/2920): Hydraulic System, Auxiliary (287 reports)
- [JASC 2921](https://openairdocs.org/jasc/2921): Hydraulic Accumulator, Auxiliary (42 reports)
- [JASC 2922](https://openairdocs.org/jasc/2922): Hydraulic Filter, Auxiliary (20 reports)
- [JASC 2923](https://openairdocs.org/jasc/2923): Hydraulic Pump, Auxiliary (138 reports)
- [JASC 2925](https://openairdocs.org/jasc/2925): Hydraulic Pressure Relief, Auxiliary (4 reports)
- [JASC 2926](https://openairdocs.org/jasc/2926): Hydraulic Reservoir, Auxiliary (14 reports)
- [JASC 2927](https://openairdocs.org/jasc/2927): Hydraulic Pressure Regulator, Auxiliary (8 reports)
- [JASC 2930](https://openairdocs.org/jasc/2930): Hydraulic Indicating System (549 reports)
- [JASC 2931](https://openairdocs.org/jasc/2931): Hydraulic Pressure Indicator (160 reports)
- [JASC 2932](https://openairdocs.org/jasc/2932): Hydraulic Pressure Sensor (290 reports)
- [JASC 2933](https://openairdocs.org/jasc/2933): Hydraulic Quantity Indicator (121 reports)
- [JASC 2934](https://openairdocs.org/jasc/2934): Hydraulic Quantity Sensor (96 reports)
- [JASC 2997](https://openairdocs.org/jasc/2997): Hydraulic Power System Wiring (343 reports)

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