# JASC 4930: APU Engine Fuel and Control

- Type: JASC system/component code (FAA)
- ATA chapter: 49 Airborne Auxiliary Power
- Title in the code table: APU ENGINE FUEL AND CONTROL
- Service difficulty reports: 1,087
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=44
- Page: https://openairdocs.org/jasc/4930

## What it covers

The system and components which furnishes fuel from the aircraft tanks to the APU fuel control and associated injector nozzles. Including the unit which provides fuel at the proper pressure for fuel control operation; and the unit controlling and injecting metered fuel to the engine burner can section. Typical parts are shutoff valve, line, fitting, etc.

## Service difficulty reports (1,087, newest 50)

- [SDR YENA2026100900933](https://openairdocs.org/sdr/YENA2026100900933), Oct 8, 2026: Airbus A321271NX. PUMP. FAILED. FLT 033, BOS-CDG. (ETOPS) AT PREFLIGHT APU START APU FUEL LO PR ECAM (APU FUEL PUMP). R & R APU FUEL PUMP IAW AMM 28-22- (N4073J)
- [SDR AALA202610108558](https://openairdocs.org/sdr/AALA202610108558), Oct 7, 2026: Airbus A321231. FCU. LEAKING. AIRCRAFT WAS GROUNDED: FLIGHT ATTENDANTS REPORTED A CRAYON TYPE BURNING SMELL DURING APPROACH AND TAXI AFTER LANDING. SM (N932AM)
- [SDR CALA2026092119558](https://openairdocs.org/sdr/CALA2026092119558), Sep 19, 2026: Boeing 767424ER. PACKING. LEAKING. ODOR IN A/C APU SUPPLYING PACKS FOUND APU FUEL CONTROL CLUSTER LEAKING. O-RINGS NEED TO BE REPLACED. EIGHT O-RINGS WERE  (N76055)
- [SDR DALA2026092205276](https://openairdocs.org/sdr/DALA2026092205276), Sep 15, 2026: Boeing 767432ER. PACKING. LEAKING. AFTER APU START HAD A FUEL ODOR AFTER SHUT DOWN, IT BEGAN TO DECREASE. BOTH PACKING ON FUEL SUPPLY TUBE FUEL CONTROL UNI (N842MH)
- [SDR AALA202608215048](https://openairdocs.org/sdr/AALA202608215048), Aug 19, 2026: Airbus A319132. FCU. LEAKING. AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED DIRTY SOCK SMELL WITH APU ON - MAINTENANCE FOUND THE APU AIR INTAKE PLENUM A (N829AW)
- [SDR CALA2026070717599](https://openairdocs.org/sdr/CALA2026070717599), Jul 6, 2026: Boeing 767424ER. PACKING. LEAKING. CREW REPORTED FUEL ODOR FROM PACKS. FOUND SUBSTAINTIAL FUEL LEAK FROM APU ACCESS DOOR AND 313AL (APU CONTROL BAY ACCESS  (N69059)
- [SDR SWIA2026070176357](https://openairdocs.org/sdr/SWIA2026070176357), Jul 1, 2026: Cndair CL6002B19. SOLENOID VALVE. ODOR. DURING CRUISE, SMELL OF FUEL IN COCKPIT. FA REPORTED SMELL OF FUEL IN THE CABIN. SMELLED STRONGER TOWARD THE REAR OF CAB (N218PS)
- [SDR CALA2026060916951](https://openairdocs.org/sdr/CALA2026060916951), Jun 7, 2026: Boeing 767424ER. FCU. FAULTED. WITH APU RUNNING EXHAUST FUMES ENTERING AIRCRAFT.DURING TRANSIT CHECK FOUND BIG FUEL LEAK FROM FCU APU , CHECKED WITH AL (N76055)
- [SDR AALA202606038566](https://openairdocs.org/sdr/AALA202606038566), May 31, 2026: Airbus A321211. FCU. LEAKING. AIRCRAFT WAS GROUNDED: FLIGHT DECK EXPERIENCED MODERATE "MOLDY SOCK" ODOR DURING IDLE POWER DESCENT INTO CLT. THE ODOR S (N167US)
- [SDR AALA202604205833](https://openairdocs.org/sdr/AALA202604205833), Apr 14, 2026: Airbus A319112. FCU. LEAKING. AIRCRAFT WAS GROUNDED: WITH APU BLEED ON, STRONG FOUL SMELL. AFTER ENGINE START AND APUSELECTED OFF, SMELL DISSIPATED. O (N762US)
- [SDR YENA2026041000386](https://openairdocs.org/sdr/YENA2026041000386), Apr 8, 2026: Airbus A321271NX. PRESSURE SYSTEM. FAILED. FLT# 724, LAX-JFK. (ETOPS) "APU AUTOSHUTDOWN; REMOVED AND REPLACED SWITCH PRESSURE 7QC IAW AMM 28-22-83 OPS CHK GOOD A/C (N4074J)
- [SDR CALA2026040615069](https://openairdocs.org/sdr/CALA2026040615069), Apr 5, 2026: Airbus A319132. FUEL LINE. LEAKING. WHEN PACKS ARE RUNNING ON APU BLEED STRONG FUEL OR EXHAUST SMELL INBD CREW REPOERTED ONLY SMELL WHEN USING THE APU. AFTE (N893UA)
- [SDR CALA2026040615068](https://openairdocs.org/sdr/CALA2026040615068), Apr 3, 2026: Boeing 767424ER. SEAL. LEAKING. APU LEAKING, SMELLS LIKE GAS IN AIRPLANE FOUND DEFECTIVE APU FUEL POWER UNIT LINE SEAL, R/R APU FUEL POWER UNIT SEALS PE (N76055)
- [SDR YENA2026032700343](https://openairdocs.org/sdr/YENA2026032700343), Mar 26, 2026: Airbus A321271NX. FUEL CONTROL. FAILED. FLT # 8580 MLB- JFK (ETOPS). " APU AUTO SHUTDOWN.; REMOVED AND REPLACED FCU IAW AMM 49-32-11. OPS CHK GOOD. A/C OK FOR S (N2199J)
- [SDR DALA2026031101673](https://openairdocs.org/sdr/DALA2026031101673), Mar 10, 2026: Airbus A319114. ACTUATOR. LEAKING. DURING TAXI OUT, STRONG FUME ODOR FILLED THE FLIGHT DECK. FO DID NOT NOTICE (BUT SAID HE HAS BAD SENSE OF SMELL) STRONGE (N322NB)
- [SDR HNAA2026030200165](https://openairdocs.org/sdr/HNAA2026030200165), Mar 2, 2026: Emb EMB145LR. GASKET. LEAKING. AMMAENDED: STRONG FUEL SMELL/ODOR ENTERED COCKPIT AND CABIN ON APU START HAS EXTENSIVE HISTORY - APU FAIL ON EICAS MESSA (N690AE)
- [SDR AALA202602183501](https://openairdocs.org/sdr/AALA202602183501), Feb 16, 2026: Airbus A319112. FCU. LEAKING. AIRCRAFT WAS GROUNDED: AIRCRAFT HAD SUBTLE HINTS OF ODOR SIMILAR TO SOF EVENT BUT NOT BAD ENOUGH OR PERSISTENT ENOUGH TO (N773XF)
- [SDR AALA202602189663](https://openairdocs.org/sdr/AALA202602189663), Feb 10, 2026: Airbus A319112. FCU. ODOR. AIRCRAFT WAS GROUNDED: INBOUND FLIGHT ATTENDANTS REPORTED THAT ON THE DECENT IN THE KEY WEST BELOW 10,000 FT THEY SMELT  (N773XF)
- [SDR CALA2026021013647](https://openairdocs.org/sdr/CALA2026021013647), Feb 8, 2026: Boeing 767424ER. PACKING. LEAKING. PUDDLE OF LIQUID UNDERNEATH APU. LIQUID APPEARS TO BE DRIPPING FROM APU. UPON INSPECTION OF APU, FOUND APU RETURN TUBE F (N66051)
- [SDR YENA2026020900159](https://openairdocs.org/sdr/YENA2026020900159), Feb 7, 2026: Airbus A320232. FCU. LEAKING. FLT 471, LGA-FLL, F4 REPORTED ODOR EVENT BELOW 10000 FT DECENDING INTO FLL DESCRIBED AS METALLIC CHEMICAL ODOR AND FEELI (N625JB)
- [SDR CALA2026011913037](https://openairdocs.org/sdr/CALA2026011913037), Jan 15, 2026: Boeing 767424ER. O-RING. LEAKING. APU LEAKING FUEL STRONG ODER OF FUEL IN CABIN. APU FUEL SUPPLY LINE [6] MM 49-31-01-004-001-001 (401) FIG 401 SHEET 2 (S (N76055)
- [SDR DALA2026011900408](https://openairdocs.org/sdr/DALA2026011900408), Jan 10, 2026: Airbus A321271NX. ACTUATOR. LEAKING. PRE-DEPARTURE UPON USING APU BLEED FOR ACFT, WE EXPERIENCED MILD FUMES CONTINUED FOR 1 MINUTE. FOUND APU IGV ACTUATOR LE (N536DN)
- [SDR FDEA202601060006](https://openairdocs.org/sdr/FDEA202601060006), Jan 6, 2026: Boeing 7673S2F. VALVE. LEAKING. DURING POST FLIGHT WALK AROUND FOUND FUEL LEAKING FROM LEFT WING AFT SPAR FWD OF LMLG, SHUT DOWN THE APU AND FUEL STOPPE (N131FE)
- [SDR NACA2025123000001](https://openairdocs.org/sdr/NACA2025123000001), Dec 30, 2025: Boeing 7673BG. ACTUATOR. FAILED. APU FUEL SHUT OFF VALVE FAILED AN OPS CHECK. APU FIRE SWITCH CHECK, DOES NOT CLOSE OR OPEN ELECTRICALLY. R & R THE APU S (N563NC)
- [SDR YENA2025102101045](https://openairdocs.org/sdr/YENA2025102101045), Oct 16, 2025: Airbus A320232. VALVE. LEAKING. FLT#429, PHL-FLL. F/AS ADVISE CABIN ODOR SMELL ON AIRCRAFT; COMPLIED WITH ALL TASKS ASSIGNED TO W/O 1448876. APU & COMP  (N655JB)
- [SDR CALA2025101610165](https://openairdocs.org/sdr/CALA2025101610165), Oct 14, 2025: Boeing 767424ER. O-RING. LEAKING. FUEL FUMES IN THE CABIN AND COCKPIT CONFIRMED FUEL ODOR COMING FROM BOTH PACKS. T/S TO APU FUEL LEAKING FUEL. APU FIRE H (N66056)
- [SDR I5PA2025101375701](https://openairdocs.org/sdr/I5PA2025101375701), Oct 13, 2025: Boeing 75729J. SHUTOFF VALVE. FAULTY. FLT: MGE831, APU FUEL VAL EICAS. R & R APU FUEL SHUTOFF VALVE IAW AMM, OPS CHECK NORMAL. (N757QM)
- [SDR YENA2025101401033](https://openairdocs.org/sdr/YENA2025101401033), Oct 13, 2025: Airbus A321231. FCU. LEAKING. FLT 189, JFK-SAN. DESCENDING THROUGH 9000 FT ON ARRIVAL, FLIGHT ATTENDANT IN AFT GALLEY REPORTED FUMES (DIRTY SOCK SMELL (N969JT)
- [SDR CALA2025092509249](https://openairdocs.org/sdr/CALA2025092509249), Sep 24, 2025: Airbus A319132. DRAIN LINE. CLOGGED. FUEL ODOR IN CABIN WITH APU DEBRIEFED CREW, FUEL ODOR DURING APU BLEED ON. SMELLED ODOR IN FLIGHT DECK FOR A FEW MINS. P (N884UA)
- [SDR CALA2025090808562](https://openairdocs.org/sdr/CALA2025090808562), Sep 6, 2025: Boeing 767424ER. FUEL CONTROL. LEAKING. UPON APU START CABIN FILLED WITH FUEL VAPOR. SHUTDOWN APU UPON INSP OF APU FOUND FUEL LEAK FROM APU FUEL CONTROL FOUND A (N69059)
- [SDR CALA2025090208342](https://openairdocs.org/sdr/CALA2025090208342), Aug 30, 2025: Boeing 767424ER. FUEL SYS. LEAKING. CREW REPORTS FUEL SMELL IN CABIN. FUEL FOUND LEAKING FROM APU COPMARTMENT. APU FUEL CONTROLLER LEAKING AT SURGE CONTROL  (N77066)
- [SDR NACA2025081900001](https://openairdocs.org/sdr/NACA2025081900001), Aug 19, 2025: Boeing 7673BG. SHUTOFF VALVE. STUCK. APU ECU SELF TEST SHOWS FAULT IGV ACT. PERFORMED APU ECU BITE TEST IAW AMM 49-61-05-742-045. NO FAULTS FOUND. BITE TEST  (N563NC)
- [SDR CALA2025081407732](https://openairdocs.org/sdr/CALA2025081407732), Aug 12, 2025: Boeing 767424ER. PACKING. LEAKING. ODOR IN CABIN DURING APU VISUAL INSPECTION, FOUND APU FCU LEAKING FUEL AT IGV ACTUATOR LINES ON FCU SIDE, R & R FUEL DRA (N76055)
- [SDR YENA2025081300830](https://openairdocs.org/sdr/YENA2025081300830), Aug 12, 2025: Airbus A321271NX. PRESSURE SWITCH. FAULTED. FLT#2288, JFK-AMS. (ETOPS) APU FUEL LO PRESS ON APU PAGE ( APU SYSTEM A321NEO ETOPS ); REMOVED AND REPLACED APU FUEL PUM (N4076J)
- [SDR CALA2025080507288](https://openairdocs.org/sdr/CALA2025080507288), Aug 1, 2025: Boeing 767424ER. O-RING. DETERIORATED. SIGNIFICANT FUEL SMELL THROUGHOUT CABIN WHILE DOING EXTERIOR WALKAROUND FOUND APU LEAKING FUEL. UPON FURTHER INSPECTION  (N67058)
- [SDR YENA2025072100736](https://openairdocs.org/sdr/YENA2025072100736), Jul 18, 2025: Airbus A321271NX. FCU. FAILED. FLT#1333, BOS-SFO. (ETOPS) APU FAILED TO START IAW A49-00-01A. 3 START ATTEMPTS MADE OAT - 48 FL 360 ( APU SYSTEM A321NE (N4077J)
- [SDR HALA20250715214](https://openairdocs.org/sdr/HALA20250715214), Jul 14, 2025: Airbus A330243. FUEL CONTROL. FAULTED. ETOPS - APU AUTO SHUTDOWN @ 80%. REMOVED & REPLACED APU FUEL CONT UNIT IAW AMM 49-32-51-000/400-801A. BLEED/LEAK /OPS CH (N396HA)
- [SDR CALA2025070806313](https://openairdocs.org/sdr/CALA2025070806313), Jul 6, 2025: Boeing 767424ER. FUEL SYS. LEAKING. TOXIC FUMES IN CABIN. APU FUEL LEAK. RAN BOTH PACKS, INSPECTED THE CABIN AND PERFORMED INSPECTION IAW AMM 05-54-56. NO S (N66056)
- [SDR DALA2025063004847](https://openairdocs.org/sdr/DALA2025063004847), Jun 29, 2025: Boeing 767432ER. O-RING. LEAKING. CREW NOTED, FUEL SMELL IN CABIN. CORRECTIVE ACTION: FOUND FUEL LEAK AT APU INLET GUIDE VANE SURGE CONT. VALVE SUPPLY LIN (N841MH)
- [SDR WX0A2025063032477](https://openairdocs.org/sdr/WX0A2025063032477), Jun 27, 2025: Airbus A320214. FUEL CONTROL. LEAKING. (AIRCRAFT NOT GROUNDED) FLIGHT ATTENDANT REPORTS DIRTY SOCK SMELL AT 18,000 FEET IN DECENT. / TC 21-000-001 ACCOMPLISHED (N279NV)
- [SDR YENA2025062300646](https://openairdocs.org/sdr/YENA2025062300646), Jun 23, 2025: Airbus A321271NX. FUEL CONTROL. FAILED. FLT#2220, LHR-JFK. (ETOPS) 'APU AUTO SHUTDOWN; REMOVED AND REPLACED APU FUEL CONTROL UNIT IAW AMM 49-32-11. OPS CHECK GO (N4080J)
- [SDR YENA2025061300604](https://openairdocs.org/sdr/YENA2025061300604), Jun 12, 2025: Airbus A321271NX. FUEL FILTER. FAILED. FLT#2220, LHR-JFK. (ETOPS). 'APU FAILED AFTER COLD SOAK START (3) ATTEMPTS ( APU SYSTEM A321NEO ETOPS ); FOLLOWED TSM 49 (N4077J)
- [SDR HALA20250611176](https://openairdocs.org/sdr/HALA20250611176), Jun 10, 2025: Airbus A330243. FUEL CONTROL. FAULTED. ETOPS - AFTER THE LANDING APU FAULT. REMOVED AND REPLACED FUEL CONTROL UNIT AT APU PERFORMED TEST ARE OK A/C IS OK TO CO (N389HA)
- [SDR YENA2025060400564](https://openairdocs.org/sdr/YENA2025060400564), Jun 4, 2025: Airbus A321271NX. PUMP. ILLUMINATED. FLT#324, LAX-JFK. (ETOPS). APU CLASS II MESSAGE ( CLASS II MAINTENANCE MESSAGES DISPLAYED ). REPLACED APU FUEL PUMP REF  (N2165J)
- [SDR UIEA2025052100663](https://openairdocs.org/sdr/UIEA2025052100663), May 21, 2025: Boeing 76731B. FUEL FILTER. NOT REPORTED. APU REQUIRES REPLACEMENT OF FUEL FILTER AT OR BEFORE 450 FLIGHT HOURS PER AMM 28-11-00-582-342. REMOVED FILTER IAW 767 A (N664GT)
- [SDR HALA20250512130](https://openairdocs.org/sdr/HALA20250512130), May 11, 2025: Airbus A330243. APU. SHUTDOWN. ETOPS - APU AUTO SHUTDOWN. BLED APU FUEL LINE AND REMOVED AND REPLACED FUEL TRIM PIPE ISOLATION VALVE ACTUATOR IAW AMM28 (N378HA)
- [SDR HALA20250421111](https://openairdocs.org/sdr/HALA20250421111), Apr 20, 2025: Airbus A330243. PRESSURE SWITCH. INOPERATIVE. ETOPS-AFTER LANDING DURING APU START APU AFT PUMP FAULT. REMOVED AND REPLACED APU LOW FUEL PRESSURE SWITCH PER AMM 49-31 (N380HA)
- [SDR HALA20250421110](https://openairdocs.org/sdr/HALA20250421110), Apr 18, 2025: Airbus A321271N. FUEL FILTER. FAULTED. ETOPS-APU AUTO SHUTDOWN TWICE ON STARTUP. FOUND CLOGGED OIL FILTER GEN SCAV + LUBE FILTERS MSG. REMOVED AND REPLACED OIL (N213HA)
- [SDR YENA2025041600405](https://openairdocs.org/sdr/YENA2025041600405), Apr 15, 2025: Airbus A321271NX. PUMP. FAILED. FLT#34, CDG-BOS. '(ETOPS) 'APU CLASS 2 MAINTENANCE MESSAGE AT SHUTDOWN'; REMOVED AND REPLACED APU FUEL FILTER IAW AMM 49 (N4062J)
- [SDR HALA20250407102](https://openairdocs.org/sdr/HALA20250407102), Apr 5, 2025: Airbus A330243. PUMP. FAULTED. ETOPS - FUEL APU AFT PUMP FAULT CAME ON AFTER START UP. REMOVED AND REPLACED APU AFT FUEL PUMP PER AMM 28-22-52. OPS AND (N380HA)

All 1,087: https://openairdocs.org/jasc/4930/reports.md

## Other codes in chapter 49

- [JASC 4900](https://openairdocs.org/jasc/4900): Airborne Auxiliary Power Unit (APU) System (1,839 reports)
- [JASC 4910](https://openairdocs.org/jasc/4910): APU Cowling/Containment (950 reports)
- [JASC 4920](https://openairdocs.org/jasc/4920): APU Core Engine (2,429 reports)
- [JASC 4940](https://openairdocs.org/jasc/4940): APU Start/Ignition System (1,424 reports)
- [JASC 4950](https://openairdocs.org/jasc/4950): APU Bleed Air System (949 reports)
- [JASC 4960](https://openairdocs.org/jasc/4960): APU Controls (383 reports)
- [JASC 4970](https://openairdocs.org/jasc/4970): APU Indicating System (272 reports)
- [JASC 4980](https://openairdocs.org/jasc/4980): APU Exhaust System (164 reports)
- [JASC 4990](https://openairdocs.org/jasc/4990): APU Oil System (2,648 reports)
- [JASC 4997](https://openairdocs.org/jasc/4997): APU System Wiring (226 reports)

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