# JASC 7731: Engine Ignition Analyzer - Type: JASC system/component code (FAA) - ATA chapter: 77 Engine Indicating - Title in the code table: ENGINE IGNITION ANALYZER - Service difficulty reports: 15 - FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=67 - Page: https://openairdocs.org/jasc/7731 ## What it covers The unit which interprets and indicates by oscilloscope the condition of ignition systems on reciprocating engines. ## Service difficulty reports (15) - [SDR IPXA202305308762](https://openairdocs.org/sdr/IPXA202305308762), May 29, 2023: Boeing 75724APF. UNKNOWN. UNKNOWN. *SDR FILED OPEN* *DIVERSION* HIGH N1 VIBE INDICATION IN LEFT ENGINE (N467UP) - [SDR HALA2022121200307](https://openairdocs.org/sdr/HALA2022121200307), Dec 10, 2022: Airbus A330243. RCCB. FAULTED. ETOPS-DUE TO N1, N2 & BB VIBRATION REPORTED ANOMALIES ON NR 1 ENGINE. REMOVED AND REPLACED THE NR 1 ENG RCC IAW AMM 77-3 (N375HA) - [SDR N6WA2022091901](https://openairdocs.org/sdr/N6WA2022091901), Sep 14, 2022: Cndair CL6002C10. ENGINE. VIBRATION. ENG 2 VIB N1 AMBER RANGE (1.9). R AND R FAN BLADE PINS AND BUMPERS IAW CRJ 550 AMM 72-21-02, PERFORMED ENGINE RUNS AT ID (N573GJ) - [SDR UIEA2022041000281](https://openairdocs.org/sdr/UIEA2022041000281), Apr 12, 2022: Boeing 767324. CABLE. SHORTED. #1 ENGINE VIB INDICATION INTERMITTENT T/S PER W/D ; 77-31-11. REPLACED SHORTED OUT L ENG T677 FAN ACCELEROMETER CABLE IA (N645GT) - [SDR CALA2022020700338](https://openairdocs.org/sdr/CALA2022020700338), Feb 7, 2022: Boeing 757224. ENGINE. VIBRATION. NO 1 ENG VIBE 2.6-3.0 NO VIBE FELT 2.6-3.0 HIGHEST IND FL390 PER PREVIOUS UPDATE CODE B7 ON AVM CHECKED WIREING SECURITY (N17139) - [SDR HAL2022F00000](https://openairdocs.org/sdr/HAL2022F00000), Dec 17, 2021: Airbus A330243. COMPUTER. DEFECTIVE. ETOPS - #1 ENGINE VIBRATION MONITOR INOP // REPLACED CSU P/N 065-50001-0200 S/N OFF 04253. NO HELP. PER A330 AMM 27-51. (N375HA) - [SDR UIEA2021110302331](https://openairdocs.org/sdr/UIEA2021110302331), Nov 2, 2021: Boeing 76733A. NONE. NONE. LEFT / #1 ENGINE "VIB" INDICATION BETWEEN 1 AND 4 ON STATUS PAGE DURING DEPARTURE. FLUCTUATIONS WERE ALSO SLIGHTLY FELT. (N1997A) - [SDR UIEA2021090401955](https://openairdocs.org/sdr/UIEA2021090401955), Sep 4, 2021: Boeing 76736N. ACCELEROMETER. FAULTED. #2 ENG EXCESSIVE VIBRATIONS DURING INITIAL CLIMB ON (LPT), RANGING FROM 0.5 TO 5.0(

TRANSFERRED TO MDDR 153024 IAW MEL (N1093A) - [SDR UIEA2021071001508](https://openairdocs.org/sdr/UIEA2021071001508), Jul 10, 2021: Boeing 767306. INDICATION SYS. FALSE INDICATION. INDICATION ON RIGHT ENG FAN VIBRATION FLUCTUATING BETWEEN 1.0 < 3.5 ON CLIMB OUT FOR A FEW MINS. NO ABNORMAL VIBRATIO (N1229A) - [SDR UIEA2021020400229](https://openairdocs.org/sdr/UIEA2021020400229), Feb 4, 2021: Boeing 767375. ENGINE. VIBRATION. ABOVE FL 250 KIAS AIRFRAME VIBRATION WITH LOW TONE HUMMING, OCCURS CONTINUOUSLY THROUGHOUT THE FLIGHT DURING CLIMB. N1 ( (N1709A) - [SDR UIEA2019121326064](https://openairdocs.org/sdr/UIEA2019121326064), Dec 12, 2019: Boeing 767306. WARNING MESSAGE. ILLUMINATED. ON THE CLIMB, L/H ENG DISPLAYED 3.5 VIB FAN AT CLIMB POWER (104.1). EVENT RECORD WAS PUSHED.&NBSP;(

PERFORMED FIM 71-0 (N1427A) - [SDR UIEA2017031700360](https://openairdocs.org/sdr/UIEA2017031700360), Mar 10, 2017: Boeing 76738E. ACCELEROMETER. MALFUNCTIONED. ON CLIMB OUT LT ENG VIBRATION INDICATOR FAN 4.1. INSTALLED ALT ACCELEROMETER IAW AMM 77-31-01. ACCOMPLISHED FAN LUBE IAW (N641GT) - [SDR ASMF201511005](https://openairdocs.org/sdr/ASMF201511005), Nov 3, 2015: Boeing 737752. UNKNOWN. VIBRATION. CAPTAIN REPORTED THAT DURING CLIMB, THE LT ENG VIBRATION REACHED 4.2 UNITS. PERFORMED FIM 71-05 TASK 808 PROCEDURE, NO D (N788XA) - [SDR FDEA201509182900](https://openairdocs.org/sdr/FDEA201509182900), Sep 18, 2015: Boeing 75727B. ACCELEROMETER. FAILED. LEFT ENG BREAD BAND VIBRATION INDICATOR ENTERED & REMAINED IN AMBER BAND. CREW CONDUCTED COMPULSORY LT ENG SHUTDOWN IAW (N916FD) - [SDR 2014FA0000197](https://openairdocs.org/sdr/2014FA0000197), Mar 19, 2014: TRANSDUCER. INTERMITTENT. PILOT REPORTED AN INTERMITTENT OIL PRESSURE GAUGE. MECHANIC TROUBLESHOT SYSTEM, & INSTALLED A NEW OIL PRESSURE TRANSDUCE (N481S) ## Other codes in chapter 77 - [JASC 7700](https://openairdocs.org/jasc/7700): Engine Indicating System (705 reports) - [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 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) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.