# JASC 8012: Engine Start Valves/Controls

- Type: JASC system/component code (FAA)
- ATA chapter: 80 Starting
- Title in the code table: ENGINE START VALVES/CONTROLS
- Service difficulty reports: 839
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=69
- Page: https://openairdocs.org/jasc/8012

## What it covers

The valves and controls used for starting engines.

## Service difficulty reports (839, newest 50)

- [SDR ABXA20261005446](https://openairdocs.org/sdr/ABXA20261005446), Oct 5, 2026: Boeing 7673P6. START VALVE. FAULTED. DURING TAXI, RIGHT ENG START VALVE. CREW RETURNED TO THE GATE (BTB). MTC DEFERRED R ENG START VALVE IAW B767 MEL 80-00-2 (N763CK)
- [SDR ABXA20260909400](https://openairdocs.org/sdr/ABXA20260909400), Sep 9, 2026: Boeing 767328. START VALVE. FAULTED. DURING TAXI, WHILE STARTING LH ENGINE, START VALVE LIGHT ILLUMINATED, NO ROTATION. A/C RETURNED TO THE GATE (BTB) AND MT (N1499A)
- [SDR VNAA2026090924601](https://openairdocs.org/sdr/VNAA2026090924601), Sep 8, 2026: Cndair CL6002D24. START VALVE. OPEN. R START VLV OPEN IN FLIGHT C/A REMOVED AND REPLACED STARTER AND STARTER CONTROL VALVE IAW AMM 80-11-01-000/400-801-AO1-P (N562NN)
- [SDR AALA202608303210](https://openairdocs.org/sdr/AALA202608303210), Aug 29, 2026: Boeing 737823. START VALVE. STUCK. AIRCRAFT WAS GROUNDED: START VALVE OPEN LIGHT IN FLIGHT. DECESION MADE TO RETURN TO PHX, EMERGENCY DECLARED AND AIRCRAT  (N929NN)
- [SDR CALA2026082018763](https://openairdocs.org/sdr/CALA2026082018763), Aug 17, 2026: Boeing 737724. START VALVE. FAULTY. ENGINE START START VALVE OPEN MESSAGE FLASHES FOR UP TO 10 SECONDS & THEN STAYS ON DURING ENGINE OPS. T/S E1 START VALVE (N24715)
- [SDR 2026F00190](https://openairdocs.org/sdr/2026F00190), Aug 15, 2026: Boeing 7378. START VALVE. FAULTED. ENGINE #1 START VALVE DO NOT OPEN, WAS CARRY OUT PROCEDURE STARTER AIR VALVE WAS REPLACED IAW AMM 80-11-02-000-801-G00.
- [SDR ABXA20260814361](https://openairdocs.org/sdr/ABXA20260814361), Aug 14, 2026: Boeing 76737D. START VALVE. MALFUNCTIONED. DURING TAXI OUT ATTEMPTED TO START NR 1 ENGINE, N2 ADVANCED TO 26% BUT VALVE LIGHT ON L STAYED ILLUMINATED ATTEMPTED 2ND (N1327A)
- [SDR ABXA20260801343](https://openairdocs.org/sdr/ABXA20260801343), Aug 1, 2026: Boeing 767223. START VALVE. MALFUNCTIONED. DURIING TAXI OUT, STARTING RH ENGINE RH ENGINE STARTER EICAS MESSAGE , NO N2 INCREASE ON START AC RETURNED TO GATE (BTB) (N312AA)
- [SDR ABXA20260724335](https://openairdocs.org/sdr/ABXA20260724335), Jul 24, 2026: Boeing 767328. START VALVE. MALFUNCTIONED. DURING TAXI OUT DURING ATTEMPTED ENGINE START,OVERHEAD VALVE LIGHT WOULD NOT EXTINGUISH ,INTERMITTENT "L ENG STARTER" EI (N1499A)
- [SDR ABXA20260720328](https://openairdocs.org/sdr/ABXA20260720328), Jul 20, 2026: Boeing 767328. START VALVE. FAULTED. ON TAXI OUT, DURING LEFT ENGINE CROSS BLEED, START VALVE LIGHT REMAINED ILLUMINATED AND DUCT PRESSURE DROPPED TO ZERO. A (N1499A)
- [SDR ABXA20260703301](https://openairdocs.org/sdr/ABXA20260703301), Jul 3, 2026: Boeing 767381. START VALVE. MALFUNCTIONED. DURING TAXI WHILE STARTING RH ENGINE START VALVE WILL NOT OPEN, A/C RETURNED TO GATE AND MTX GROUNDED A/C AND DEFERRED R (N290CM)
- [SDR ABXA20260617266](https://openairdocs.org/sdr/ABXA20260617266), Jun 17, 2026: Boeing 767338. START VALVE. FAULTED. DURING ENGINE START, LT ENGINE START VALVE INOPERATIVE. ACFT RETURNED TO THE GATE (BTB). DEFERRED LT START VALVE IAW MEL (N371CM)
- [SDR ABXA202604264173](https://openairdocs.org/sdr/ABXA202604264173), Apr 24, 2026: Boeing 76737D. START VALVE. FAULTED. DURING TAXI OUT WHILE STARTING NR 1 ENGINE NO ROTATION ON NR 1, START VALVE STAYED OPEN , A/C RETURNED TO THE GATE (BTB) (N1327A)
- [SDR I5PA2026031588802](https://openairdocs.org/sdr/I5PA2026031588802), Mar 15, 2026: Boeing 757230. START VALVE. INOPERATIVE. RIGHT ENGINE START VALVE FAILED TO OPEN. REPLACED RIGHT ENGINE START VALVE PER AMM. (N888LT)
- [SDR ABXA2026020231043](https://openairdocs.org/sdr/ABXA2026020231043), Jan 31, 2026: Boeing 76736N. START VALVE. FAILED. ON TAXI OUT WHILE STARTING LEFT HAND ENGINE START VALVE DID NOT OPEN ,LEFT STARTER EICAS MESSAGE APEARED. AC RETURNED TO (N1013A)
- [SDR ABXA20260130039](https://openairdocs.org/sdr/ABXA20260130039), Jan 30, 2026: Boeing 767231. START VALVE. DEFECTIVE. DURING TAXI OUT, UPON START ATTEMPT FOR LH ENG, ENG START VALVE WOULD NOT OPEN. AIRCRAFT RETURNED TO BLOCKS (BTB). DEFER (N650GT)
- [SDR ABXA20260129035](https://openairdocs.org/sdr/ABXA20260129035), Jan 29, 2026: Boeing 76736N. START VALVE. FAULTED. ON TAXI OUT, LEFT ENGINE EICAS LEFT ENGINE START AND OVERHEAD VALVE LIGHT ILLUMINATED DURING START. ACFT RETURNED TO BLO (N1013A)
- [SDR IPXA2026012682273](https://openairdocs.org/sdr/IPXA2026012682273), Jan 26, 2026: Boeing 74744AF. START VALVE. FAULTED. AIR TURN BACK, NR 3 STARTER CUTOUT EICAS MESSAGE IN CLIMB, CONTINUED THROUGH FLIGHT. QRH PROCEDURE FOLLOWED. R & R NR 3  (N572UP)
- [SDR ABXA20251214340](https://openairdocs.org/sdr/ABXA20251214340), Dec 14, 2025: Boeing 76736N. START VALVE. FAULTED. ON TAXI OUT, LEFT ENGINE START VALVE DISCREET LIGHT ON. AIRCRAFT RETURNED TO BLOCKS (BTB). MAINTENANCE ACTUATED START VA (N1093A)
- [SDR SWAA2025120842628](https://openairdocs.org/sdr/SWAA2025120842628), Dec 4, 2025: Boeing 7378. START VALVE. FAILED. NUMBER 2 ENGINE FAILED TO START. ( REPEAT WRITE UP) R & R THE NR 2 ENGINE STARTER AIR VALVE IAW AMM 80-11-02, RAN NR 2 E (N8742M)
- [SDR UIEA2025112201321](https://openairdocs.org/sdr/UIEA2025112201321), Nov 22, 2025: Boeing 74747UF. START VALVE. WARNING MESSAGE. STARTER CUTOUT MSG. R & R ENG NR 1 ENG START VALVE IAW AMM 80-11-01. OPS CHECKED GOOD, NO FAULTS NOTED. ENG 1 START VALV (N477MC)
- [SDR ABXA20251111296](https://openairdocs.org/sdr/ABXA20251111296), Nov 11, 2025: Boeing 767381. START VALVE. DEFECTIVE. DURING TAXI, RH ENG START VALVE WOULD NOT GO TO COMMANDED POSITION. AIRCRAFT RETURNED TO BLOCKS (BTB). DEFERRED IAW ABX- (N290CM)
- [SDR ABXA20251111291](https://openairdocs.org/sdr/ABXA20251111291), Nov 11, 2025: Boeing 767383. START VALVE. FAULTED. DURING TAXI OUT RT ENG START VALVE WOULD NOT GO TO COMMANDED POSITION. ACFT RETURNED TO GATE AND MTX GROUNDED ACFT. MTX  (N290CM)
- [SDR ABXA20250912227](https://openairdocs.org/sdr/ABXA20250912227), Sep 12, 2025: Boeing 767341. START VALVE. FAULTED. ON TAXI OUT STARTING LH ENGINE LEFT ENGINE START VALVE WOULD NOT OPEN AC RETURNED TO GATE (BTB) MTX GROUNDED AC. MTC CYC (N760CK)
- [SDR CALA2025090508482](https://openairdocs.org/sdr/CALA2025090508482), Sep 2, 2025: Airbus A320232. WARNING LIGHT. FALSE ACTIVATION. ECAM ENG 1 START VALVE FAULT REQUESTING DEFFERAL 8011M ENG 1 START VALVE INDICATION ERRONIOUS. START VALVE VERIFIED CLOS (N4901U)
- [SDR 2025F00207](https://openairdocs.org/sdr/2025F00207), Aug 28, 2025: Airbus A320214. START VALVE. FAILED. ENG 2 START VALVE FAULT . START VALVE NOT OPEN (N728AV)
- [SDR ABXA20250819181](https://openairdocs.org/sdr/ABXA20250819181), Aug 19, 2025: Boeing 767306. START VALVE. FAILED. DURING TAXI OUT, LEFT ENGINE START VALVE FAILED TO OPEN. NO ROTATION, L ENG STARTER EICAS , VALVE LIGHT. AIRCRAFT RETURN (N1229A)
- [SDR ABXA20250802169](https://openairdocs.org/sdr/ABXA20250802169), Aug 2, 2025: Boeing 7673P6. START VALVE. INOPERATIVE. ON TAXI, RT ENGINE START VALVE INOP. AIRCRAFT RETURNED TO BLOCKS (BTB). MAINTENANCE DEFERRED IAW MEL C ABX-80-00-2-1. RE (N762CK)
- [SDR HNAA2025072300472](https://openairdocs.org/sdr/HNAA2025072300472), Jul 22, 2025: Emb EMB145LR. START VALVE. FAULTED. DURING CLIMB AT ABOUT 3K BLEED 2 LEAK MESAGE ON EICAS, C/W QRH, MESSAGE CLEARED FACT 22JUL25 10:51 CLT RRD GROUND AIR ST (N640AE)
- [SDR CALA2025071706675](https://openairdocs.org/sdr/CALA2025071706675), Jul 16, 2025: Boeing 737724. START VALVE. FAULTED. NUMBER 2 START VALVE OPEN LIGHT FLASHING ON TAKEOFF REMOVED ENG #2 START VALVE & PULLED ASSOCIATED CB REF AMM TASK 80-11 (N24736)
- [SDR SWAA2025063086696](https://openairdocs.org/sdr/SWAA2025063086696), Jun 29, 2025: Boeing 7377H4. START VALVE. FAULTY. DURNING ENGINE #2 START; APU BARELY MADE 22% N2; STARTER LEVER RAISED TO START ENG #2; ENG 2 OVERHEAT LIGHT ILLUMINATED. (N479WN)
- [SDR ABXA2025621133](https://openairdocs.org/sdr/ABXA2025621133), Jun 21, 2025: Boeing 767338. START VALVE. DEFECTIVE. DURING PUSHBACK, #2 ENGINE RIGHT ENGINE STARTER VALVE INOP. AIRCRAFT RETURNED TO BLOCKS. (BTB) . DEFERRED IAW MEL C ABX- (N364CM)
- [SDR AALA202506171098](https://openairdocs.org/sdr/AALA202506171098), Jun 15, 2025: Boeing 737823. START VALVE. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DISPLAYED SHOWING ENGINE 1 OIL QUANTITY 0 IN FLIGHT, OIL PRESSU (N944AN)
- [SDR VNAA2025060911101](https://openairdocs.org/sdr/VNAA2025060911101), Jun 6, 2025: Cndair CL6002D24. START VALVE. INOPERATIVE. LEFT ENG START VALVE OPENED IN FLT. EMERGENCY DECLARED. / REMOVE AND REPLACED RELAYS K23,K25,AND K31 OF JB11-PCB4 IAW CR (N569NN)
- [SDR ABXA20250602113](https://openairdocs.org/sdr/ABXA20250602113), Jun 2, 2025: Boeing 767281. START VALVE. FAULTED. ON TAXI OUT AND ENGINE START, RIGHT ENGINE START VALVE DID NOT OPEN WHEN START SELECTOR MOVED TO GROUND. AIRCRAFT RETURN (N760AX)
- [SDR ABXA20250601112](https://openairdocs.org/sdr/ABXA20250601112), Jun 1, 2025: Boeing 767281. START VALVE. MALFUNCTIONED. ON TAXI OUT AND ENGINE START, RT ENGINE START VALVE LIGHT AND NO N2 DURINIG GROUND START. RIGHT ENGINE START VALVE WIOUL (N760AX)
- [SDR ABXA202505287107](https://openairdocs.org/sdr/ABXA202505287107), May 27, 2025: Boeing 767341. START VALVE. MALFUNCTIONED. AFTER PUSH BACK, RH ENGINE NOT STARTING - VALVE LIGHT RH ON ALL THE TIME. A/C RETURNED TO BLOCKS (BTB) AND MTX GROUND A/ (N760CK)
- [SDR ABXA20250524104](https://openairdocs.org/sdr/ABXA20250524104), May 24, 2025: Boeing 767341. START VALVE. FAULTED. DURING TAXI OUT WHILE STARTING RH ENGINE R START VALVE ANNUN ILL WITH ENG START(RH) IN GND THE VALVE LIGHT WILL EXT W/ S (N760CK)
- [SDR ABXA20250411075](https://openairdocs.org/sdr/ABXA20250411075), Apr 11, 2025: Boeing 767383. START VALVE. INOPERATIVE. DURING TAXI OUT WHILE STARTING #2 ENGINE ,#2 ENGINE START VALVE WILL NOT OPEN DURING START. A/C RETURNED TO GATE (BTB) A (N220CY)
- [SDR NACA2025032900001](https://openairdocs.org/sdr/NACA2025032900001), Mar 29, 2025: Boeing 7673BG. START VALVE. FAILED. R STARTER CUTOUT EICAS MULTIPLE TIMES IN FLIGHT. REMOVED AND REPLACED RH ENGINE START VALVE IAW AMM 80-11-02 (N566NC)
- [SDR NACA2025032200001](https://openairdocs.org/sdr/NACA2025032200001), Mar 22, 2025: Boeing 7673BG. START VALVE. FAULTED. RIGHT STARTER EICAS MESSAGE ILLUMINATED ON START. DEFERRED RH ENG START VALVES PER MEL 80-00-02-01 (N566NC)
- [SDR NACA2025032100003](https://openairdocs.org/sdr/NACA2025032100003), Mar 21, 2025: Boeing 767323. START VALVE. FAILED. #1 ENG START FAIL #1 ENG STARTER. REPLACED #1 ENG START VALVE. (N321CM)
- [SDR ABXA20250315056](https://openairdocs.org/sdr/ABXA20250315056), Mar 15, 2025: Boeing 767375. START VALVE. MALFUNCTIONED. DURING TAXI WHILRE STARTING #2 ENG. IT FAILED TO START. A/C RETURNED TO THE GATE(BTB0 AND MTX GROUNDED A/C MTX DEFERRED  (N1709A)
- [SDR NACA2025031300001](https://openairdocs.org/sdr/NACA2025031300001), Mar 13, 2025: Boeing 7673BG. START VALVE. FAILED. R ENG STARTER EICAS MESSAGE. ACCOMPLISHED FIM 80 REPLACED ENG IGN AND CONTROL MODULE IAW AMM 80-11-05 OPS CHECK GOOD. OV (N565NC)
- [SDR ABXA202503065054](https://openairdocs.org/sdr/ABXA202503065054), Mar 5, 2025: Boeing 767338. START VALVE. MALFUNCTIONED. DURING TAXI, LEFT ENGINE START VALVE FAILED TO OPEN. VALVE LIGHT ON OVERHEAD ILLUMINATED "LEFT ENGINE STARTER" EICAS MES (N362CM)
- [SDR ABXA20250214039](https://openairdocs.org/sdr/ABXA20250214039), Feb 14, 2025: Boeing 767338. START VALVE. FAULTED. DURING TAXI STARTING LH ENGINE THERE WAS NO ROTATION ON LH ENGINE , A/C RETURNED TO THE GATE (BTB) AND MTX GROUNDED A/C  (N362CM)
- [SDR ABXA20250122020](https://openairdocs.org/sdr/ABXA20250122020), Jan 22, 2025: Boeing 767328. START VALVE. MALFUNCTIONED. DURING TAXI WHILE STARTING #2 ENGINE START VALVE FAILED TO OPEN. A/C RETURNED TO THE GATE (BTB) AND MTX GROUNDED A/C. MT (N1499A)
- [SDR CALA2025012301981](https://openairdocs.org/sdr/CALA2025012301981), Jan 21, 2025: Boeing 737924ER. START VALVE. FROZEN. FUEL SMELL IN THE CABIN AFTER STARTING ENG 2 FUEL SMELL IN CABIN DUE TO ENG 2 STARTER VALVE NOT CLOSING, LOGPAGE 3603994 (N62894)
- [SDR I5PA2025011868801](https://openairdocs.org/sdr/I5PA2025011868801), Jan 18, 2025: Boeing 757230. START VALVE. INOPERATIVE. RT STARTER VALVE INOP. RT STARTER VALVE INOP. R/R RT STARTER VALVE PER AMM. (N688SL)
- [SDR ABXA20250115011](https://openairdocs.org/sdr/ABXA20250115011), Jan 15, 2025: Boeing 767383. START VALVE. MALFUNCTIONED. DURING TAXI WHILE STARTING RH ENGINE ,R STARTER CUTOUT AFTER STARTING RIGHT ENGINE.AC RETURNED TO THE GATE (BTB) AND MTX (N220CY)

All 839: https://openairdocs.org/jasc/8012/reports.md

## Other codes in chapter 80

- [JASC 8000](https://openairdocs.org/jasc/8000): Engine Starting System (135 reports)
- [JASC 8010](https://openairdocs.org/jasc/8010): Engine Cranking (318 reports)
- [JASC 8011](https://openairdocs.org/jasc/8011): Engine Starter (1,467 reports)
- [JASC 8097](https://openairdocs.org/jasc/8097): Engine Starting System Wiring (117 reports)

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