# JASC 7700: Engine Indicating System

- Type: JASC system/component code (FAA)
- ATA chapter: 77 Engine Indicating
- Title in the code table: ENGINE INDICATING SYSTEM
- Service difficulty reports: 705
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=66
- Page: https://openairdocs.org/jasc/7700

## What it covers

For general reports of engine indicating system discrepancies with insufficient information to file in a more specific JASC 7700 series code. This code is also used for reports with multiple engine indications.

## Service difficulty reports (705, newest 50)

- [SDR DALA2026090805038](https://openairdocs.org/sdr/DALA2026090805038), Sep 6, 2026: Boeing 717200. INDICATION SYS. FAULTED. RTO- DISCONTINUED TAKE OFF AT THROTTLE UP IN ATL DUE TO AMBER XXS ON BOTH N1 AND N2 VIBE INDICATIONS. CREW RESET C/B AND (N982AT)
- [SDR AALA202608269809](https://openairdocs.org/sdr/AALA202608269809), Aug 23, 2026: Boeing 7378. SHUTOFF VALVE. INOPERATIVE. AIRCRAFT WAS GROUNDED: LEFT ENG OVERHEAT LIGHT AFTER TAKEOFF AT 4000 FEET. ACCOMPLISHED QRH CHECKLIST AND RETURNED BACK  (N315UA)
- [SDR AALA202607279677](https://openairdocs.org/sdr/AALA202607279677), Jul 24, 2026: Airbus A321231. RELAY. FAULTED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED INTO CLT DUE TO THE FLIGHT CREW REPORTING AN ENGINE 2 EPR FAULT ON DESC (N582UW)
- [SDR MDGA202607180001](https://openairdocs.org/sdr/MDGA202607180001), Jul 16, 2026: Raythn 400ARAYTHEON. DCU. FAILED. IN CLIMB, THE RIGHT ENGINE INDICATION BLINKED SEVERAL TIMES AND THEN WAS COMPLETELY LOST. AIRCRAFT RETURNED TO DEPARTURE (N489AM)
- [SDR DALA2026061803634](https://openairdocs.org/sdr/DALA2026061803634), Jun 16, 2026: Boeing 767432ER. SENSOR. DAMAGED. ABORTED TAKE OFF AT 60KTS DUE TO BIRD STRIKE ON LEFT ENGINE. ALL PARAMETERS REMAINED NORMAL. ON INITIAL INSPECTION FOUND (N836MH)
- [SDR SIMA20260504001](https://openairdocs.org/sdr/SIMA20260504001), May 4, 2026: Emb ERJ170200LR. WARNING MESSAGE. FALSE ACTIVATION. ENG 2 N1, ENG 2 ITT, AND ENG 2 FUEL FLOW INDICATIONS APPEARED INFLIGHT AND ENGNE FAIL INDCTION ON APPROACH. CREW DECLARE (N222NS)
- [SDR CALA2026032414819](https://openairdocs.org/sdr/CALA2026032414819), Mar 22, 2026: Boeing 757224. TRANSMITTER. FAULTED. ERRONEOUS ENG INDICATION ON NUN 2 ENG. EPR READ OVER 2.0. FUEL F LOW WAS 2000 LESS THAN NR 1. SPOKE WITH FLT CREW. PHOTO (N17126)
- [SDR ABXA20260307088](https://openairdocs.org/sdr/ABXA20260307088), Mar 7, 2026: Boeing 767328. COMPUTER. MALFUNCTIONED. DURING TAXI OUT, OIL PRESSURE INDICATION IS ERRATIC, FLUCTUATING BETWEEN 0 TO NORMAL. ALL OTHER ENGINE INDICATIONS NORMA (N1499A)
- [SDR YENA2026030600274](https://openairdocs.org/sdr/YENA2026030600274), Mar 5, 2026: Airbus A320232. LGCIU. FAULTED. FLT# 2951 JFK-JFK ." N656JB-FLT-2951-JFK-CUN-RTF THE A/C IS RETURNING TO THE FIELD IN JFK DUE TO AN LGCIU 2 FAULT DRIVIN (N656JB)
- [SDR VNAA2026022813001](https://openairdocs.org/sdr/VNAA2026022813001), Feb 24, 2026: Cndair CL6002C10. PCB. FAILED. L VIB FAULT, R VIB FAULT, STATUS MESSAGE AT FL230. REMOVED AND REPLACED JB2, PCB2 IAW CRJ 700 AMM 24-01-05-000/400-801-A (N531EG)
- [SDR YEN2025F00009](https://openairdocs.org/sdr/YEN2025F00009), Nov 16, 2025: Airbus A321271NX. SENSOR. FAULTED. FLT#2220, LHR-JFK. (ETOPS) "EXTERNAL POWER WAS INTERRUPTED 3 TIMES, CAUSING ENGINE SENSOR FAULT TO OCCUR; ENG 1&2 GROUND (N4074J)
- [SDR ABXA202511143298](https://openairdocs.org/sdr/ABXA202511143298), Nov 13, 2025: Boeing 767231. EGT INDICATION. ILLUMINATED. RIGHT ENG ABORTED ENG START DURING TAXI OUT,BECAUSE OF HOT START. EXCEEDED LIMITS FOR 1 SEC. UP TO 539 DEGREES.A/C RETUR (N651GT)
- [SDR ABXA20251024277](https://openairdocs.org/sdr/ABXA20251024277), Oct 24, 2025: Boeing 767231. SENSOR. MALFUNCTIONED. FL320 L ENG STARTED SURGING, EPR +/- .55, N1 +/- 2.3, EGT +/- 20. FOLLOWED QRH, ENGINE STABILIZED IN "FLT" IGN. MODE- RE (N650GT)
- [SDR FXTA2025111000001](https://openairdocs.org/sdr/FXTA2025111000001), Oct 20, 2025: Textrn 408. TRANSDUCER. FAILED. ON TAKE OFF RIGHT ENGINE LOSS TORQUE INDICATION. (N703BA)
- [SDR NACA2025100400001](https://openairdocs.org/sdr/NACA2025100400001), Oct 4, 2025: Boeing 76733A. SENSE LINE. CHAFED. STATIC PRESSURE SENSE LINE TUBE CHAFED ON #2 ENG. INBD FAN COWL. REMOVED AND REPLACED STATIC PRESSURE SENSE LINE TUBE ON (N567NC)
- [SDR 2025FA0000682](https://openairdocs.org/sdr/2025FA0000682), Oct 1, 2025: Bolkms BK117C2. PROBE. FAULTY. DURING START UP THE PILOT NOTED A HIGH RISE IN TEMP WHICH EXCEEDED ALLOWABLE TEMP FOR START. IMMEDIATELY SHUT THE ENGINE (N140SF)
- [SDR QMLA2025100420098](https://openairdocs.org/sdr/QMLA2025100420098), Sep 30, 2025: Urocop EC130B4. DISPLAY. FAULTED. JUST LIFTED OFF FROM A PR EVENT & HEADING BACK TO BASE, NOTICED UPPER SCREEN OF VEMD HAD REVERTED TO 3-PARAMETERS ENGINE (N336AM)
- [SDR CALA2025092209115](https://openairdocs.org/sdr/CALA2025092209115), Sep 17, 2025: Boeing 757224. ACCELEROMETER. FAULTED. LEFT ENGINE N3 VIB WENT TO 5.0 /AMBER/ TWICE FL380 .78 REDUCED T HRUST N3 STABLE AT .8 AS PART OF OTHER TROUBLESHOOTING, (N17133)
- [SDR CALA2025090508533](https://openairdocs.org/sdr/CALA2025090508533), Sep 3, 2025: Airbus A319131. RELAY. FAULTED. AFTER T/O RECEIVED ENG 2 EGT OVER LIMIT EGT WAS AROUND 650 FLASH ING RED FOUND SEVERAL EGT THERMOCOUPLE CONNECTIONS LOOS (N827UA)
- [SDR QR9R2025082000001](https://openairdocs.org/sdr/QR9R2025082000001), Aug 20, 2025: Bolkms BK117C2. SWITCH. INTERMITTENT. #2 ENGINE OVERSPEED FAIL INTERMITTENT DURING SHUTDOWN. SIX REPEATED OVERSPEED FAILURES PRECEDED THIS FAULT ON DIFFERENT 
- [SDR IPXA2025082965432](https://openairdocs.org/sdr/IPXA2025082965432), Aug 14, 2025: Boeing 76734AF. DUCT. CRACKED. NUMBER 1 ENG LPT ACC MANIFOLD 6:00 POS.I.A.W. AMM 75-24-03-004-050-H00 REV.145 AND AMM 75-24-03-404-037-H00 REV.145 REPL (N347UP)
- [SDR SWAA2025072893950](https://openairdocs.org/sdr/SWAA2025072893950), Jul 22, 2025: Boeing 7377H4. SENSOR. FAULTY. TWO POPS HEARD ON NR 1 ENGINE AT 41K FT .79 MACH TAT -32C N1 ROLLED BACK APPROX 5%. . AUTOTHROTTLES DID NOT DISCONNECT A (N488WN)
- [SDR HALA20250617184](https://openairdocs.org/sdr/HALA20250617184), Jun 16, 2025: Airbus A321271N. SENSOR. FAULTED. ETOPS - ON DECENT AS THRUST WENT TO IDLE "ENG 1 SENSOR FAULT". REMOVED BURNER PRESSURE SENSOR AND BURNER PRESSURE SENSOR (N213HA)
- [SDR NACA2025061500001](https://openairdocs.org/sdr/NACA2025061500001), Jun 15, 2025: Boeing 7673BG. METER. WITHIN LIMITS. R ENGINE VIBE METER GOES UP AND DOWN FROM 0.0 TO 1.1 PERFORMED AMM 71-00-00 R ENG VIBRATION N1 WITHIN LIMIT. PERFORMED R (N566NC)
- [SDR AALA202506167319](https://openairdocs.org/sdr/AALA202506167319), Jun 13, 2025: Airbus A319112. SENSE LINE. CHAFED. AIRCRAFT WAS GROUNDED: CLIMBING THROUGH 10,000 FT ENG1 N1 84.3, ENG2 88.8. CLIMB THRUST, SHOULD HAVE BEEN 88.9 ON BOTH E (N710UW)
- [SDR HALA20250612178](https://openairdocs.org/sdr/HALA20250612178), Jun 11, 2025: Airbus A330243. THERMOCOUPLE. DAMAGED. ETOPS - WHILE PERFORMING HP-IP BORESCOPE INSP TC: A2010-07-09-PART01 FOUND TERMINAL ON VENT TUBE OVERHEAT THERMOCOUPLE D (N370HA)
- [SDR ANCF20250609616](https://openairdocs.org/sdr/ANCF20250609616), Jun 6, 2025: Airbus A320214. INDICATION SYS. FAULTED. ENG HIGH VIB AT T/O AFTER THUSH LEVERS IDLE FAULT IND DISAPPEAR. THIS REPORT ITEM IS DEFERREED IAW DMI/MEL 77-00-02-3 IT (N477AV)
- [SDR DALA2025060204228](https://openairdocs.org/sdr/DALA2025060204228), May 30, 2025: Boeing 757351. VALVE. WARNING LIGHT. SHIP 5810 -DIV/PRES/DE- TO TPA LOSS OF BOTH ENGINE BLEEDS. CORRECTIVE ACTION: R/R LT ENGINE FAN AIR TEMP SENSOR, FAN AIR (N590NW)
- [SDR FXTA20250526001](https://openairdocs.org/sdr/FXTA20250526001), May 21, 2025: Cessna 208B. INDICATION SYS. FAULTED. ENGINE INSTRUMENTS STOPPED DISPLAYING WHILE IN CRUISE. PILOT DIVERTED TO NEAREST AIRPORT. MECHANIC DISPATCHED TO INSPECT (N215BA)
- [SDR NACA2025042800001](https://openairdocs.org/sdr/NACA2025042800001), Apr 28, 2025: Boeing 7673BG. ACCELEROMETER. FAILED. RIGHT ENGINE VIBRATION INDICATOR INTERMITTENTLY READS BETWEEN 0.3 AND 5.0 DURING CLIMB OUT OF SPJC. REPLACED RH ACCELERO (N566NC)
- [SDR QR9R2025042100001](https://openairdocs.org/sdr/QR9R2025042100001), Apr 21, 2025: Bolkms BK117C2. TORQUE BOX. FAILED. DURING START RUN-UP, VAR NR WOULD NOT SYNC ENG 1 AND 2. AT FLIGHT IDLE ENG 1 N1 78 AND ENG 2 N1 85. MANUALLY SETTING WOU
- [SDR NACA2025041400001](https://openairdocs.org/sdr/NACA2025041400001), Apr 14, 2025: Boeing 767323. PROBE. FAULTED. R ENG EEC STATUS MESSAGE. PERFORMED FIM 71-01 FT 803 PMU BITE PROCEDURE SHOWED 2.9 BLEED VALVE THERMOCOUPLE PROBE CH-B O (N563NC)
- [SDR ABXA20250407071](https://openairdocs.org/sdr/ABXA20250407071), Apr 7, 2025: Boeing 76731B. MODULE. MALFUNCTIONED. ON TAKEOFF, RIGHT N1 DID NOT ADVANCE MORE THAN 60%. RH ENG NOT MAKING TAKEOFF PWR. ABORTED TAKEOFF, RETURNED TO BLOCKS ( (N1361A)
- [SDR FXTA20250417001](https://openairdocs.org/sdr/FXTA20250417001), Apr 2, 2025: Cessna 208B. WARNING MESSAGE. ACTIVATED. WHILE IS CRUISE FLIGHT NG WENT HIGH AND BLINKED RED FOLLOWED BY CAS EXCEEDANCE MESSAGE. INSPECTED AND NO FAULTS FOUND. B (N215BA)
- [SDR HNAA2025040300194](https://openairdocs.org/sdr/HNAA2025040300194), Apr 2, 2025: Emb EMB145LR. SENSOR. ABNORMAL. IN THE CLIMB FROM CLT E1 OIL TEMPERATURE WENT INTO THE RED FOR APPROXIMATELY 1 MINUTE THEN RETURNED TO NORMAL. 20 PSI IN (N918AE)
- [SDR HNA2025F00002](https://openairdocs.org/sdr/HNA2025F00002), Apr 2, 2025: Emb EMB145LR. SENSOR. FAULTED. N THE CLIMB FROM CLT E1 OIL TEMPERATURE WENT INTO THE RED FOR APPROXIMATELY 1 MINUTE THEN RETURNED TO NORMAL 20 PSI INCR (N690AE)
- [SDR HNAA2025040300192](https://openairdocs.org/sdr/HNAA2025040300192), Apr 2, 2025: Emb EMB145LR. SENSOR. FAULTED. IN THE CLIMB FROM CLT E1 OIL TEMPERATURE WENT INTO THE RED FOR APPROXIMATELY 1 MINUTE THEN RETURNED TO NORMAL 20 PSI INC (N918AE)
- [SDR SIMA20250330001](https://openairdocs.org/sdr/SIMA20250330001), Mar 30, 2025: Emb ERJ170200LR. INDICATOR. INOPERATIVE. LOSS OF ALL ENGINE 1 INDICATIONS DURING DESCENT INTO MSO. SUBSEQUENT AT FAIL CAUTION AND ELEV THRUST COMP FAIL CAUTION M (N259NN)
- [SDR CALA2025032803296](https://openairdocs.org/sdr/CALA2025032803296), Mar 25, 2025: Boeing 777300ER. SENSOR. FAULTED. REF LOG. PGS. 4283873 AND 4283765. FOUND FAULT 36-10325. FOUND SHOP FAULTS: FAULT NUMBER 43, SHOP DATA "GH" AND MANIFOLD (N2846U)
- [SDR YENA2025032400301](https://openairdocs.org/sdr/YENA2025032400301), Mar 21, 2025: Airbus A320232. THERMOSTAT. FAILED. FLT#2121, FLL-LAX. (AIRCRAFT DECLARED AN EMERGENCY).' ON CLIMB OUT 2 TIMES AIR ENG 1 BLEED ABNORMAL MSG CLEARED ITSELF 3 (N613JB)
- [SDR CALA2025031802928](https://openairdocs.org/sdr/CALA2025031802928), Mar 15, 2025: Boeing 757224. TRANSMITTER. FAULTED. LOW SPEED REJECT FOR LOSS OF DIGITAL EPR INDICATIONS AND LOSS OF AUTOTHROTTLE E2TOMC APPROVES THE MEL 7711F FOR THE E2 L (N12109)
- [SDR 7C7A2025030900011](https://openairdocs.org/sdr/7C7A2025030900011), Mar 9, 2025: Dhav DHC8106. GAUGE. INTERMITTENT. #2 ITT GAUGE INTERMITTENTLY INOP (N887EA)
- [SDR NACA2025013100001](https://openairdocs.org/sdr/NACA2025013100001), Jan 31, 2025: Boeing 7673BG. ACCELEROMETER. VIBRATION. LEFT ENGINE VIBE SHOWS NO INDICATION. REMOVED AND REPLACED THE LEFT ENG ACCELEROMETER IAW AMM 77-31-01 OPS CHECK NORMAL. (N566NC)
- [SDR NACA2025011500001](https://openairdocs.org/sdr/NACA2025011500001), Jan 15, 2025: Boeing 767323. INDICATOR. MALFUNCTIONED. DURING MOTORING OF LH ENGINE N2 INDICATION FOUND UNRESPONSIVE. N2 ON STANDBY ENGINE INDICATOR ALSO NONRESPONSIVE. FOUND  (N321CM)
- [SDR ABXA20241212254](https://openairdocs.org/sdr/ABXA20241212254), Dec 12, 2024: Boeing 767231. PROBE. MALFUNCTIONED. RIGHT ENGINE SURGED DURING CLIMB, AC DECLARED EMERGENCY AND PERFORMED (ATB) AC RETURNED TO GATE AND MTX GROUNDED AC .AC  (N651GT)
- [SDR QR9R2024111500002](https://openairdocs.org/sdr/QR9R2024111500002), Nov 15, 2024: Bolkms BK117C2. MONITORING UNIT. WARNING LIGHT. VAR NR CAUTION LIGHT WOULD NOT GO OFF AT A HOVER. A TEST FLIGHT EVAL FOUND VARNR LIGHT NEVER WENT OUT FROM FLAT PITCH TO
- [SDR DXTA2024112201240](https://openairdocs.org/sdr/DXTA2024112201240), Nov 13, 2024: Cndair CL6002B16. WARNING LIGHT. ILLUMINATED. DURING CLIMB TO CRUISE ALTITUDE JUST A FEW MINUTES PRIOR TO LEVEL OFF WITH AUTOPILOT AND ATS ON, THE RED ENGINE ICAS ILL (N231QS)
- [SDR CALA2024111101097](https://openairdocs.org/sdr/CALA2024111101097), Nov 11, 2024: Boeing 7879. CONCENTRATOR. FAULTY. STATUS MSG MEDC LEFT CHANNEL A FAULTED CAUSING MULTIPLE STATUS MESSAGES AND THE INABILITY TO TURN OFF THE LEFT EAI VALVE (N29981)
- [SDR QR9R2024110400001](https://openairdocs.org/sdr/QR9R2024110400001), Nov 4, 2024: Bolkms BK117C2. TORQUE BOX. FAILED. #1 TRQ INDICATION INOP AND YELLOW, WITH FLI DEGRADE. REPLACED TORQUE ADJUSTMENT BOX IAW AMM 77-12-00, 4-2. MTF MOC SUCCE
- [SDR QR9R2024110100001](https://openairdocs.org/sdr/QR9R2024110100001), Nov 1, 2024: Bolkms BK117C2. TACHOMETER. WARNING LIGHT. DURING START RUN-UP, OVSP CAUTION LIGHT ILLUMINATED FOR THE #2 ENGINE. REMOVED AND REPLACED #2 TACHOMETER BOX IAW AMM 80

All 705: https://openairdocs.org/jasc/7700/reports.md

## Other codes in chapter 77

- [JASC 7710](https://openairdocs.org/jasc/7710): Power Indicating System (191 reports)
- [JASC 7711](https://openairdocs.org/jasc/7711): Engine Pressure Ratio (EPR) (456 reports)
- [JASC 7712](https://openairdocs.org/jasc/7712): Engine BMEP/Torque Indicating (1,239 reports)
- [JASC 7713](https://openairdocs.org/jasc/7713): Manifold Pressure (MP) Indicating (77 reports)
- [JASC 7714](https://openairdocs.org/jasc/7714): Engine RPM Indicating System (1,357 reports)
- [JASC 7720](https://openairdocs.org/jasc/7720): Engine Temperature Indicating System (695 reports)
- [JASC 7721](https://openairdocs.org/jasc/7721): Cylinder Head Temperature (CHT) Indicating System (62 reports)
- [JASC 7722](https://openairdocs.org/jasc/7722): Engine EGT/TIT Indicating System (1,198 reports)
- [JASC 7730](https://openairdocs.org/jasc/7730): Engine Ignition Analyzer System (52 reports)
- [JASC 7731](https://openairdocs.org/jasc/7731): Engine Ignition Analyzer (15 reports)
- [JASC 7732](https://openairdocs.org/jasc/7732): Engine Vibration Analyzer (237 reports)
- [JASC 7740](https://openairdocs.org/jasc/7740): Engine Integrated Instrument System (53 reports)
- [JASC 7797](https://openairdocs.org/jasc/7797): Engine Indicating System Wiring (592 reports)

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