# Service difficulty reports: JASC 2934

A list on [JASC 2934](https://openairdocs.org/jasc/2934.md).

Reports filed under 2934 · Hydraulic Quantity Sensor, newest first.

Page 1 of 2 · 96 reports

- [SDR CALA2025052604945](https://openairdocs.org/sdr/CALA2025052604945.md): Transmitter · faulted · May 22, 2025 · N812UA · Airbus A319131
  > CREW REPORTS GREEN HYDRAULIC LEVEL DROPPED QUICKLY IN FLIGHT. WHEN RETURNING TO GROUND AND PUTTING A LOAD ON SYSTEM GREEN HYDRAULIC FLUID LEVEL WENT BACK UP TO SATISFACTORY. HYDRAULIC PRESSURE REMAINED CONSTANT. PERFORM DETAILED WALK AROUND DID NOT FIND ANY
- [SDR CALA2024070901978](https://openairdocs.org/sdr/CALA2024070901978.md): Transmitter · faulted · Jul 7, 2024 · N657UA · Boeing 767322
  > LOSS OF L HYD QTY WDM 29-33-11-2. RECONNECTED D38 AND REINSTALLED HYD MON UNIT. INSPECTED LT HYD QTY TRANSMITTER, SUSPECT TRANSMITTER AT FAULT. LT HYD QTY SHOWS 1.00 AT GATE. PERFORMED WIRE HARNESS SHAKEDOWN IAW WDM 29-33-11-2. ALL MEG CHECKED AND CONTINUIT
- [SDR CALA2023112403457](https://openairdocs.org/sdr/CALA2023112403457.md): Transmitter · inoperative · Nov 23, 2023 · N21723 · Boeing 737724
  > HYD SYSTEM "A" QTY DROPPING INFLIGHT--CREW STATED 71 PERCENT AND DROPPING - AIR RETURN TO IAH PERFORMED DEU 1&2 BITE CHK PER AMM 31-62-21-860-003. DEU1&2 PASSED TEST. TRANSMITTER, HY OFF 29-2909-9-9001 1625 ON 29-2909-9-9001 5456 TRANSMITTER, HY OFF 29-2909-9-
- [SDR UIEA2023093000859](https://openairdocs.org/sdr/UIEA2023093000859.md): Transmitter · unknown · Sep 29, 2023 · N322SG · Boeing 747481
  > EICAS MSG "HYD QTY LO" QRH 13.27 COMPLETED.(<P>TRANSFER TO MDDR #194292 PER MEL 29-33-01A CAT C, DUE DATE: 09OCT23. MX ACTION COMPLIED WITH. R/R #4 HYD QTY TRANSMITTER PER AMM 29-33-01. OPS AND LEAK CHECK GOOD. THIS CLOSES DMI 194292.</P>)
- [SDR CALA2022102802986](https://openairdocs.org/sdr/CALA2022102802986.md): Transmitter · warning message · Oct 28, 2022 · N882UA · Airbus A319132
  > G RSVR LOW LEVEL ECAMAT FL310 AVAIL ON BOTH CONNECTORS. DUE TO HISTORY, ALSO RECOMMEND REPLACING THE GREEN SYS QUAN. TRANSMITTER. PHOTO -- POST FLIGHT REPORT T/S REF TSM 29-11-00-810-803-A. FOUND GREEN SYSTEM LOW LEVEL INSTALLED NEW CANNON PLUG CONNECTOR 1000G
- [SDR AALA202207067325](https://openairdocs.org/sdr/AALA202207067325.md): Transmitter · faulty · Jul 3, 2022 · N323SG · Boeing 737
  > AIRCRAFT WAS GROUNDED: IN FLIGHT, HYDRAULIC SYSTEM A PRESSURE DROPPED FROM 87% TO 58% SLOWLY OVER 1 HOUR AND 50 MINUTES. FLIGHT DECLARED AN EMERGENCY AND DIVERTED TO CUN, LANDING SAFELY. REPLACED HYDRAULIC SYSTEM A FLUID QUANTITY TRANSMITTER PER AMM 29-33-12.
- [SDR CALA2021053100755](https://openairdocs.org/sdr/CALA2021053100755.md): Transmitter · malfunctioned · May 31, 2021 · N87513 · Boeing 737824
  > HYD A QTY STARTED AT 101 PCT AND DROPED TO 75 PCT IN 1 HR BUT CAME UP AGAIN ON ARRIVAL, HYD A QUANTITY WAS AT 100 AND B AT 106. PERFORMED WALK AROUND AND SAW NO EVIDENCE OF HYD FLUID AROUND WINGS, RUDDER, AND ELEVATORS. RAN ELECTRIC AND ENGINE DRIVEN HYDRAUL
- [SDR DALA2019072504412](https://openairdocs.org/sdr/DALA2019072504412.md): Transmitter · faulty · Jul 22, 2019 · N828MH · Boeing 767432ER
  > SHIP 1804 FLIGHT 2341 PERFORMED ATB DUE TO L HYD QTY EICAS MESSAGE. CORRECTIVE ACTION: CHECKED FOR LEAKS FOUND L QUANTITY FLUCTUATING. DISPATCHED L HYD QTY PER MEL. REPLACED LEFT SYSTEM HYDRAULIC TRANSMITTER. MCO/PLACARD REMOVED. SYSTEM OPERATION IS NORMAL
- [SDR CALA2019051700777](https://openairdocs.org/sdr/CALA2019051700777.md): Switch · faulty · May 16, 2019 · N442UA · Airbus A320232
  > HYD GREEN RSV LOW LVL ECAM ON ARRIVALGREEN HYD QUANTITY APPEARED NORMAL ON S/D VERIFIED GREEN HYD RSV LEVEL WAS AT NORMAL OPERATING LEVEL. INSPECTED FOR LEAKS, NO LEAKS NOTED. SUSPECT GREEN HYD SYSTEM RSV LOW LEVEL SWITCH TO AT FAULT. SUGGEST REPLACING GREEN H
- [SDR ASAA2018122827625](https://openairdocs.org/sdr/ASAA2018122827625.md): Pressure Switch · failed · Dec 28, 2018 · N848VA · Airbus A320214
  > YELLOW HYDRAULIC SYSTEM LOW PRESSURE INDICATED IN FLIGHT NOSE WHEEL STEERING INOP. GROUNDED - YES. REMOVED & REPLACED PRESSURE SWITCH (3151GN) PER AMM 29-32-12-000-001-A. OPS & LEAK CK NO LEAKS FOUND OPS CK NORMAL.
- [SDR IPXA2018080332381](https://openairdocs.org/sdr/IPXA2018080332381.md): Transmitter · faulty · Aug 2, 2018 · N124UP · Airbus A300F4622R
  > DIVERSION, GREEN RES LOW LEVEL AT CRUISE PERFORMED ECAM GRAVITY FED GEAR FOR LANDING EMERG DECLARED LANDED OMA WITH NO FURTHER ISSUES. RESERVOIR QTY WAS FULL DRAINED TO NORMAL RANGE ENG HYD PUMPS AND ELEC HYD PUMPS CKD GOOD REF AMM 71-00-00 AND 29-00-00 CKD WI
- [SDR SWAA2018071223437](https://openairdocs.org/sdr/SWAA2018071223437.md): Transmitter · faulty · Jul 11, 2018 · N8601C · Boeing 7378H4
  > A HYDRAULIC QUANTITY DROPPED TO 73% AND INTO FLIGHT 1:30 A SYSTEM QUANTITY SHOWED 86% AND WHEN GEAR DOWN A QUANTITY SHOWED 94%. R&R A SYSTEM QUANTITY TRANSMITTER IAW AMM.
- [SDR CALA2018030800870](https://openairdocs.org/sdr/CALA2018030800870.md): Monitor · inoperative · Mar 8, 2018 · N676UA · Boeing 767322
  > MAIN (LEFT, RIGHT, AND CENTER) HYDRAULIC SYSTEMS HYD PRESSURE (0 1=L, 02=R) FLUCTUATES DURING EDP OR ACMP OPERATION UPDATED MAA CODE FIX USING VENDOR MAA SCREEN LEFT SYSTEM HYDRAULIC SYSTEM LOSS. FOUND LEFT HYD SYSTEM QTY READING ZERO. CHECKED RESERVOIR QTY VI
- [SDR F3LA2018012500277](https://openairdocs.org/sdr/F3LA2018012500277.md): Switch · defective · Jan 24, 2018 · N705FR · Airbus A321211
  > REFERENCE LOG PAGE 1093408, HYD G RESERVOIR LOW LEVEL. ITEM 2, HYD END 1 PUMP LOW PRESSURE. NO HYDRAULIC FLUID WAS LOST. INDICATION ISSUE ONLY. ITEM 1 AND 2. REPLACED LOW LEVEL SWITCH ON GREEN SYSTEM HYDRAULIC RESERVOIR. OPS AND LEAK CHECK GOOD. REF AMM 29-11-
- [SDR 5TTY2018011700001](https://openairdocs.org/sdr/5TTY2018011700001.md): Switch · faulty · Jan 16, 2018 · N478TA · Airbus A319132
  > LIM TO MEX. PER TSM, IT WAS FOUND A FAULTY GREEN HYD SYSTEM LOW LEVEL SW. FAULTY SWITCH WAS REPLACED AND TEST PERFORMED PER AMM WITH NOT DUPLICATION OF FAILURE. THE AIRCRAFT WAS RETURNED INTO SERVICE AFTER COMPLETING THE MENTIONED MAINTENANCE ACTIONS.
- [SDR FDEA201606232130](https://openairdocs.org/sdr/FDEA201606232130.md): Transmitter · leaking · Jun 23, 2016 · N650FE · Airbus A300F4605R
  > DURING CRUISE FLIGHT GREEN SYSTEM HYD RESERVOIR LOW LEVEL. GRAVITY GEAR EXTENSION DUE TO LOSS OF GREEN HYDRAULICS. IDENTIFIED PARTS MPN: 64250-005-2, CPN: 2910415, QTY: 1. FOUND GREEN SYSTEM PRESSURE TRANSMITTER LEAKING, REF IPC 29-32-03-01, ITEM 060B. RE
- [SDR SWAA2016042751358](https://openairdocs.org/sdr/SWAA2016042751358.md): Transmitter · faulty · Apr 25, 2016 · N710SW · Boeing 7377H4
  > DIVERSION, SYS A HYD QTY SLOWLY DROPPED FROM 65% TO 57% OVER A 20 MINUTE PERIOD AT CRUISE. SUSPECTED SYS A HYD LEAK. R & R A SYS QTY TRANSMITTER IAW MM.
- [SDR AALA201512249011](https://openairdocs.org/sdr/AALA201512249011.md): Transmitter · seized · Dec 23, 2015 · N650AW · Airbus A320232
  > AIRCRAFT WAS GNDED. DURING CRUISE RECEIVED A YELLOW ELEC PUMP OVERHEAT WARNING. EMER DECLARED. R & R PTU FOR LEAKING IAW AMM 29-23-41 PB401. NR 1 ENG DRIVEN HYD PUMP FOR NOT PRESSURIZING IAW AMM 29-13-51, YELLOW QTY TRANSMITTER FOR BEING SEIZED IAW AMM 29-
- [SDR IPXA2015122096864](https://openairdocs.org/sdr/IPXA2015122096864.md): Transmitter · inoperative · Dec 19, 2015 · N134UP · Airbus A300F4622R
  > GREEN HYD QTY INDICATOR INOPERATIVE. EMERGENCY DECLARED. LANDING GEAR GRAVITY EXTENDED IAW GREEN RESERVOIR LOW LEVEL CHECKLIST R & R GREEN RESERVOIR QTY TRANSMITTER, GREEN PRESSURE SWITCH. RESTORED LANDING GEAR SYS TO NORMAL CONDITION IAW MM 32-33-00-0201,
- [SDR CALA2015102600866](https://openairdocs.org/sdr/CALA2015102600866.md): Transmitter · unserviceable · Oct 21, 2015 · N13110 · Boeing 757224
  > LEFT HYD QTY SYS LOSS. R & R FLUID QTY TRANSMITTER FOR LT HYD SYS. OPERATIONS CHECKED GOOD IAW AMM 29-33-01.
- [SDR CALA2015091094284](https://openairdocs.org/sdr/CALA2015091094284.md): Switch · defective · Sep 8, 2015 · N823UA · Airbus A319131
  > B RSVR LO LVL DISPLAYED ON UPPER ECAM SCREEN. LOSS OF HYDS SUSPECTED. REPLACED BLUE SYS LOW LEVEL SWITCH IAW AMM 29-12-41. TEST & LEAK CHECKED GOOD.
- [SDR AALA20150707005](https://openairdocs.org/sdr/AALA20150707005.md): Switch · faulty · Jul 7, 2015 · N8001N · Airbus A319115
  > AIR INTERRUPT, EMER DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT. DURING CRUISE RECEIVED HYD YELLOW RESERVOIR LOW LEVEL ECAM MSG. R & R YELLOW HYD SYS LOW LEVEL SWITCH IAW AMM 29-13-11. PERFORMED OPERATIONAL CHECK IAW AMM 29-31-00. PERFORMED LEAK CHE
- [SDR CALA2015041300280](https://openairdocs.org/sdr/CALA2015041300280.md): Transmitter · faulty · Apr 13, 2015 · N12109 · Boeing 757224
  > RIGHT HYD QTY EICAS MSG DISPLAYED AFTER TAKEOFF WITH RT HYD RESERVOIR LIGHT ILLUMINATED. RT HYD QTY INDICATED 0 WITH RT HYD PRESS INDICATING 3000 PSI. R & R RT HYD FLUID QTY TRANSMITTER IAW AMM 29-33-01. OPERATIONALLY CHECKED IT FOR PROPER INDICATION. OPER
- [SDR FDEA201504091179](https://openairdocs.org/sdr/FDEA201504091179.md): Transmitter · inoperative · Apr 9, 2015 · N733FD · Airbus A300B4605R
  > AT CRUISE, GREEN HYD WENT TO LOW QTY ON ECAM, ECAM QTY, & OVERHEAD SYS QTY RETURNED TO NORMAL AFTER LANDING. TROUBLE SHOT & FOUND RESERVOIR READING 7.5 GAL AT DIRECT READING GAUGE ON RESERVOIR AFTER BLEEDING OFF HEAD PRESS. R & R GREEN SYS QTY TRANSMITTER I
- [SDR DXTA2015021705979](https://openairdocs.org/sdr/DXTA2015021705979.md): Switch · out of adjust · Feb 16, 2015 · N611QS · Cessna 560XL
  > LOW HYDRAULIC FLUID LEVEL LIGHT CAME ON & WOULDN'T GO OFF ALONG WITH THE CAUTION LIGHT. NO EMERGENCY EXTENSION WAS NECESSARY, DECLARED AN EMERGENCY. DID NOT OBSERVE ANY LEAKS, THE HYD RESERVOIR FULL. INSPECTED HYDRAULIC QTY SYS & FOUND LOW HYD LEVEL SWITC
- [SDR FDEA201408282346](https://openairdocs.org/sdr/FDEA201408282346.md): Transmitter · malfunctioned · Aug 28, 2014 · N664FE · Airbus A300F4605R
  > LOST GREEN HYD QTY AT CRUISE NOTIFIED BY ECAM, CONFIRMED ON OVERHEAD PANEL. COMPLIED WITH QRH. TURNED PUMPS OFF AT 1614Z LANDED AT 1713Z. R&R GREEN RESERVOIR HYD QTY TRANSMITTER. LEAK & OPERATIONS CHECKED GOOD IAW AMM.
- [SDR USAA2014081500002](https://openairdocs.org/sdr/USAA2014081500002.md): Switch · faulty · Aug 14, 2014 · N286AY · Airbus A330243
  > ROUGHLY AN HOUR BEFORE LANDING, FLIGHT GOT AN ECAM MSG THAT THE GREEN HYD RESERVOIR LEVEL LOW. IAW ECAM PROCEDURE THEY LOST SOME BRAKING, SLOWED FLIGHT CONTROLS, CAT 3 LANDING ABILITY & NOSE WHEEL STEERING. DECLARED AN EMER, OPERATIONS INFORMED THAT FLIGHT W
- [SDR CA140813002](https://openairdocs.org/sdr/CA140813002.md): Pressure Switch · leaking · Aug 8, 2014 · Snias AS350B3
  > (CAN) HYDRAULIC PRESSURE SWITCH FOUND LEAKING ON NR 2 HYD SYSTEM. PRESSURE SWITCH REPLACED WITH NEW UNIT. AFTER 83.1 HOURS OF OPERATION, REPLACED PRESSURE SWITCH, WHICH WAS FOUND TO BE LEAKING AGAIN. IT WAS REPLACED WITH A WARRANTY REPLACEMENT. THE SECOND HY
- [SDR FDEA201407241944](https://openairdocs.org/sdr/FDEA201407241944.md): Transmitter · faulty · Jul 24, 2014 · N684FE · Airbus A300F4605R
  > IN DESCENT HAD ECAM & OVERHEAD SHOWED LOSS OF FLUID & LOSS OF PRESS IN GREEN SYS. COMPLIED WITH ECAM FOR LOSS OF PRESS IN GREEN SYS. FULLY CONFIGURED FOR LANDING HYD FLUID LEVEL INDICATION CAME BACK TO NORMAL, LANDED UNEVENTFUL. R & R GREEN SYS RESERVOIR TR
- [SDR AALA20140513022](https://openairdocs.org/sdr/AALA20140513022.md): Transmitter · inoperative · May 13, 2014 · N7544A · Doug DC982
  > DFW CREW REPORTED LT HYD FLUID QTY DECREASED TO ZERO. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. LT HYD QTY TRANSMITTER. SYS GND CHECKED NORMAL, OPERATION CLOSED.
- [SDR FDEA201404270873](https://openairdocs.org/sdr/FDEA201404270873.md): Transmitter · malfunctioned · Apr 27, 2014 · N745FD · Airbus A300B4622R
  > RECEIVED ECAM WARNING, BLUE SYS RESERVOIR LOW DURING TAKEOFF ROLL. REJECTED TAKEOFF. ECAM RESERVOIR & OVERHEAD RESERVOIR FOR BLUE SYS BOTH SHOWED NORMAL. SAME INTERMITTENT WARNING THROUGHOUT FLIGHT. REPLACED QTY TRANSMITTER IAW MM 29-31-11-04. LEAK AND OPS
- [SDR SWAA2014022125421](https://openairdocs.org/sdr/SWAA2014022125421.md): Transmitter · faulty · Feb 20, 2014 · N168AT · Boeing 73776N
  > DIVERSION DURING CRUISE, LT HYD SYS SLOWLY DROPPED TO 51%. DROPPED AT A RATE OF 15 PER EVERY 4 MINUTES. R & R A SYS HYD QUANTITY TRANSMITTER, ENG DRIVEN PUMP CASE DRAIN FILTER, A SYS PRESS MODULE FILTERS & RETURN FILTERS IAW MM.
- [SDR FDEA201402060272](https://openairdocs.org/sdr/FDEA201402060272.md): Transmitter · failed · Feb 6, 2014 · N688FE · Airbus A300F4605R
  > ON DESCENT INTO AFW LOST GREEN SYS HYD QTY CONFIRMED BY ECAM HYD PAGE & GREEN SYS HYD QTY GAUGE. RAN QRH LOWERED GEAR MANUALLY. REMOVED & REPLACED GREEN SYSTEM HYD RES QTY TRANSMITTER IAW AMM 29-31-11-04, AND NO LEAKS NOTED ON OPS CHECK AND TRANSMITTER OPS C
- [SDR FDEA201401080069](https://openairdocs.org/sdr/FDEA201401080069.md): Transmitter · inoperative · Jan 8, 2014 · N689FE · Airbus A300F4605R
  > ENROUTE AT FL370, WATCHED GREEN HYD RESERVOIR LEVEL DROP TO RED DOT. COMPLIED WITH QRH. LOSS OF GREEN SYS DID NOT REACH RED DOT IN YELLOW BAND. DURING LANDING, REPORTED THAT GREEN SYS RETURNED TO HAT BAND AREA. RAN GREEN HYD SYSTEM & OPERATED FLIGHT CONTR
- [SDR FDEA201312102951](https://openairdocs.org/sdr/FDEA201312102951.md): Transmitter · inoperative · Dec 10, 2013 · N748FD · Airbus A300B4622R
  > GREEN HYD QTY DECREASED DURING FLIGHT UNTIL LOW QTY ECAM WARNING. DECLARED EMERGENCY, FOLLOWED QRH MANUAL GEAR EXTENTION HYD FAILURE REQ TOW IN. PRESS REMAINED NORMAL UNTIL QTY LOW INDICATION, VERY SLOW QTY LOSS ABOUT 2 HRS INTO FLIGHT WHEN INDICATION OCCURR
- [SDR UALA2013061304078](https://openairdocs.org/sdr/UALA2013061304078.md): Transmitter · inoperative · Jun 12, 2013 · N122UA · Boeing 747422
  > NR 1 HYD QUANTITY INDICATION INOPERATIVE ON LOWER EICAS DISPLAY. WHEEL WELL INDICATOR ALSO INOP FOR NR 1 SYS.. REPLACED HYD QTY TRANSMITTER IAW MM, OP CHECKED NORMAL.
- [SDR AALA20120925002](https://openairdocs.org/sdr/AALA20120925002.md): Transmitter · inoperative · Sep 25, 2012 · N580AA · Doug DC982
  > DFW - CREW REPORTED LEFT HYDRAULIC SYSTEM LOSS. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED LEFT HYDRAULIC QUANTITY TRANSMITTER. SYSTEM GROUND CHECK NORMAL OPERATION.
- [SDR UALA2012083104896](https://openairdocs.org/sdr/UALA2012083104896.md): Transmitter · defective · Aug 31, 2012 · N646UA · Boeing 767322
  > RT QTY EICAS MSG, RTFL. DISPLAYED AND RIGHT QTY LIGHT ILLUMINATED ON OVERHEAD PANEL. QTY INDICATION INDICATED RF ON STATUS PAGE. FLT CREW TURNED OFF RIGHT HYD PUMPS PER QRH PROCEDURE. DURING RETURN TO FIELD CREW STATED QTY STABILIZED. PUMPS TURNED ON PER
- [SDR AALA20120529013](https://openairdocs.org/sdr/AALA20120529013.md): Transmitter · inoperative · May 29, 2012 · N565AA · Doug DC983
  > ORD - CREW REPORTED HYDRAULIC PRESSURE LOW AND HYDRAULIC QUANTITY ABNORMALLY HIGH ON LEFT SYSTEM. ACCOMPLISHED QRH PROCEDURE. EMERGENCY DECLARED FLIGHT LANDED ORD WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED LEFT HYDRAULIC QUANTITY TRANSMITTER
- [SDR AALA20120519003](https://openairdocs.org/sdr/AALA20120519003.md): Transmitter · inoperative · May 19, 2012 · N199AN · Boeing 757223
  > MAN - CREW REPORTED RIGHT HYDRAULIC SYSTEM PRESSURE LIGHT ILLUMINATED. EMERGENCY DECLARED FLIGHT LANDED MAN WITHOUT INCIDENT. REPLACED QUANTITY TRANSMITTER. SYSTEM GROUND CHECK NORMAL OPERATION.
- [SDR USAA2012032700011](https://openairdocs.org/sdr/USAA2012032700011.md): Switch · faulty · Mar 26, 2012 · N667AW · Airbus A320232
  > CREW RECEIVED ECAM MESSAGE FOR GREEN HYDRAULIC SYSTEM LOW. MANUAL LANDING GEAR EXTENSION WAS REQUIRED DUE TO GREEN SYSTEM FAILURE. RETURNED TO PHX AND DECLARED AN EMERGENCY. RESET MANUAL GEAR EXTENSION HANDLE AND REPLACED GREEN RESERVOIR LOW LEVEL SWITCH IA
- [SDR CALA2011072800517](https://openairdocs.org/sdr/CALA2011072800517.md): Transmitter · failed · Jul 28, 2011 · N67052 · Boeing 767424ER
  > CENTER SYSTEM PRESSURE LOW DURING APPROACH FOR CENTER SYSTEM L OW QTY QRH CENTER SYSTEM NO LOSS OF CENTER SYSTEM PRESSURE ONLY QUANTITY INDICATION ISSUE REF L/P 8822281 AND 8822285. REMOVED & REPLACED "CENTER" HYD QTY TRANSMITTER AS PER MM 29-33-02. OPS CHEC
- [SDR UALA2011072703838](https://openairdocs.org/sdr/UALA2011072703838.md): Transmitter · failed · Jul 27, 2011 · N657UA · Boeing 767322
  > LEFT HYD QTY INDICATION. REPLACED LT HYD QTY TRANSMITTER AMM 29-33-02. R AND E WORKING SIGNAL WIRE OF PTU. AFTER TRANSMITTER WAS REPLACED FOUND DIODE BLOCK R397 WITH BRUNDY TERMINAL JAMMED IN POSITION "C". WIRE TO POSITION "C" WAS BROKEN OFF AND TIED BACK.
- [SDR AALA20110608JFK01](https://openairdocs.org/sdr/AALA20110608JFK01.md): Transmitter · inoperative · Jun 8, 2011 · N640A · Boeing 757223
  > JFK - CREW REPORTED LOSS OF CENTER HYDRAULIC SYSTEM. EMERGENCY DECLARED FLIGHT RETURNED JFK LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED CENTER HYDRAULIC FLUID QUANTITY TRANSMITTER. SYSTEM GROUND CHECK NORMAL OPERATION.
- [SDR AALA20110417DEN01](https://openairdocs.org/sdr/AALA20110417DEN01.md): Transmitter · inoperative · Apr 16, 2011 · N945AN · Boeing 737823
  > DEN - INFLIGHT SFO-ORD. CREW REPORTED DURING LEFT AND RIGHT HYDRAULIC QUANTITY LOSS INDICATION. EMERGENCY DECLARED FLIGHT DIVERTED DEN LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED THE HYDRAULIC TRANSMITTER. SYSTEM GROUND CHECK NORMAL O
- [SDR AALA20100828TUL03](https://openairdocs.org/sdr/AALA20100828TUL03.md): Transmitter · faulty · Aug 28, 2010 · N192AN · Boeing 757223
  > HNL - CREW REPORTED LEFT HYDRAULIC QUANTITY EICAS MESSAGE. HYDRAULIC QUANTITY INDICATED ZERO. EMERGENCY DECLARED RETURNED HNL LANDED WITHOUT INCIDENT. REPLACED LEFT HYDRAULIC QUANTITY TRANSMITTER. SYSTEM GROUND CHECKED NORMAL OPERATION.
- [SDR ANCF2010081900065](https://openairdocs.org/sdr/ANCF2010081900065.md): Transmitter · false indication · Aug 19, 2010 · N728CG · Boeing 767283ER
  > DURING TAKE OFF, RT HYD QTY ANNUNCIATON CAME ON. REJECTED T/O WAS PERFORMED. IAW AMM 05-51-14 PAGE 201 TO 217 AND 32-41-08. MLG INSPECTED AND CHECKED. NO DAMAGED FOUND, ALL WHEELS WERE REMOVED IAW AMM 32-45-01. IAW AMM 29-33-02 THE RT HYD QTY TRANSMITTER WAS
- [SDR UALA2010072602681](https://openairdocs.org/sdr/UALA2010072602681.md): Transmitter · fluctuates · Jul 26, 2010 · N657UA · Boeing 767322
  > LT HYD QTY FLUCTUATING. REMOVED AND SECURED PTU SIGNAL WIRE AND WILL REQUIRE RECONNECTION IAW MEL ITEM. SYS IS INOP IAW MEL. QUANTITY VERIFIED. QTY NORMAL AND LOW PRESSURE LIGHT IS OPERATIVE. REPLACED LT HYD TRANSMITTER IAW MM. NO LEAKS NOTED. RECONNECT
- [SDR UALA2009111603560](https://openairdocs.org/sdr/UALA2009111603560.md): Monitor · faulty · Nov 14, 2009 · N660UA · Boeing 767322
  > RT & LT HYD QTY LWR EICAS, RTFL. FAULT OCCURRED AFTER STATIC DISCHARGE. REPLACED HYDRAULIC FLUID QTY MONITOR UNIT. ALL OPS CHECKS SATISFACTORY.
- [SDR UALA2009091502910](https://openairdocs.org/sdr/UALA2009091502910.md): Transmitter · defective · Sep 15, 2009 · N545UA · Boeing 757222
  > LOSS ALL RIGHT HYD QUANTITY. RT SYS SHOWS ZERO ON EICAS. GAUGE AT SVC PANEL ALSO ZERO FOR RT SYSTEM. FOUND NO EVIDENCE OF HYD LEAK AFTER OPERATING ALL SYSTEMS. SITE GAUGE FOUND RESERVOIR TO BE SERVICED TO BOTTOM OF SIGHT GAUGE. PER MEL SERVICED TO TOP OF

Next page: https://openairdocs.org/jasc/2934/reports.md?page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
WHERE jasc_code = '2934'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/jasc/2934/reports

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