# JASC 7420: Ignition Harness (Distribution) - Type: JASC system/component code (FAA) - ATA chapter: 74 Ignition - Title in the code table: IGNITION HARNESS (DISTRIBUTION) - Service difficulty reports: 213 - FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=64 - Page: https://openairdocs.org/jasc/7420 ## What it covers The high tension insulated wiring from the magneto to the spark plug in reciprocating engines which provides a spark for combustion. For turbine engine, the high tension leads to burner can igniters for used for starting. Typical parts are lead, shielding, sleeve, ignition cable, terminal, ferrule, etc. ## Latest service difficulty reports - [SDR DALA2026092405344](https://openairdocs.org/sdr/DALA2026092405344), Sep 20, 2026: IGNITION LEAD, ARCED (N327DU) - [SDR 8HBR20260215075](https://openairdocs.org/sdr/8HBR20260215075), Jan 28, 2026: IGNITION LEAD, DAMAGED (N95606) - [SDR 8HBR20260215076](https://openairdocs.org/sdr/8HBR20260215076), Jan 15, 2026: IGNITION LEAD, DAMAGED (N49194) - [SDR YENA2025111301103](https://openairdocs.org/sdr/YENA2025111301103), Nov 13, 2025: IGNITION SYS, FAULTED (N4058J) - [SDR I5PA2025091768801](https://openairdocs.org/sdr/I5PA2025091768801), Sep 17, 2025: IGNITION LEAD, DAMAGED (N688SL) - [SDR I5PA2025041619301](https://openairdocs.org/sdr/I5PA2025041619301), Apr 16, 2025: IGNITION LEAD, INOPERATIVE (N193AN) - [SDR I5PA2025022519306](https://openairdocs.org/sdr/I5PA2025022519306), Feb 25, 2025: IGNITION LEAD, WORN (N193AN) - [SDR I5PA2024020675701](https://openairdocs.org/sdr/I5PA2024020675701), Feb 6, 2024: IGNITION LEAD, FAILED (N757QM) - [SDR HALA20231030238](https://openairdocs.org/sdr/HALA20231030238), Oct 29, 2023: UNKNOWN, UNKNOWN (N204HA) - [SDR ASAA2023082044727](https://openairdocs.org/sdr/ASAA2023082044727), Aug 20, 2023: IGNITION LEAD, INOPERATIVE (N408AS) - [SDR ASAA2023081444611](https://openairdocs.org/sdr/ASAA2023081444611), Aug 14, 2023: UNKNOWN, UNKNOWN (N946AK) - [SDR ASAA2023081344551](https://openairdocs.org/sdr/ASAA2023081344551), Aug 13, 2023: UNKNOWN, UNKNOWN (N960AK) - [SDR ASAA2023071644083](https://openairdocs.org/sdr/ASAA2023071644083), Jul 16, 2023: IGNITER, FAILED (N946AK) - [SDR ASAA2023043043068](https://openairdocs.org/sdr/ASAA2023043043068), Apr 30, 2023: IGNITER, DAMAGED (N562AS) - [SDR ASAA2023042242976](https://openairdocs.org/sdr/ASAA2023042242976), Apr 22, 2023: IGNITER, FAULTY (N979AK) - [SDR NACA2023041000001](https://openairdocs.org/sdr/NACA2023041000001), Apr 10, 2023: UNKNOWN, UNKNOWN (N379CX) - [SDR ASAA2023040242743](https://openairdocs.org/sdr/ASAA2023040242743), Apr 2, 2023: UNKNOWN, UNKNOWN (N932AK) - [SDR ASAA2023040142679](https://openairdocs.org/sdr/ASAA2023040142679), Apr 1, 2023: EXCITER, INOPERATIVE (N531AS) - [SDR ASAA2023032942636](https://openairdocs.org/sdr/ASAA2023032942636), Mar 29, 2023: IGNITER, DAMAGED (N532AS) - [SDR ASAA2023032042500](https://openairdocs.org/sdr/ASAA2023032042500), Mar 20, 2023: IGNITER, FAILED (N934AK) - [SDR ASAA2023030842311](https://openairdocs.org/sdr/ASAA2023030842311), Mar 8, 2023: EXCITER, FAILED (N941AK) - [SDR ASAA2023030842293](https://openairdocs.org/sdr/ASAA2023030842293), Mar 8, 2023: EXCITER, FAILED (N941AK) - [SDR ASAA2023030142195](https://openairdocs.org/sdr/ASAA2023030142195), Mar 1, 2023: IGNITER, FAULTY (N952AK) - [SDR ASAA2023030142194](https://openairdocs.org/sdr/ASAA2023030142194), Mar 1, 2023: IGNITER, FAULTY (N952AK) - [SDR ASAA2023022342087](https://openairdocs.org/sdr/ASAA2023022342087), Feb 23, 2023: IGNITER, FAULTY (N516AS) - [SDR ASAA2023022242043](https://openairdocs.org/sdr/ASAA2023022242043), Feb 22, 2023: IGNITER, INOPERATIVE (N428AS) - [SDR ASAA2023021942027](https://openairdocs.org/sdr/ASAA2023021942027), Feb 19, 2023: IGNITER, INOPERATIVE (N516AS) - [SDR ASAA2023021642003](https://openairdocs.org/sdr/ASAA2023021642003), Feb 16, 2023: EXCITER, FAULTY (N536AS) - [SDR ASAA2023020641883](https://openairdocs.org/sdr/ASAA2023020641883), Feb 6, 2023: IGNITER, UNKNOWN (N933AK) - [SDR ASAA2023013041722](https://openairdocs.org/sdr/ASAA2023013041722), Jan 30, 2023: UNKNOWN, UNKNOWN (N955AK) - [SDR ASAA2022120741101](https://openairdocs.org/sdr/ASAA2022120741101), Dec 7, 2022: IGNITER, FAILED (N461AS) - [SDR ASAA2022111540786](https://openairdocs.org/sdr/ASAA2022111540786), Nov 15, 2022: LEAD, CRACKED (N469AS) - [SDR ASAA2022082539678](https://openairdocs.org/sdr/ASAA2022082539678), Aug 25, 2022: IGNITER, FAULTY (N584AS) - [SDR ASAA2022072239192](https://openairdocs.org/sdr/ASAA2022072239192), Jul 22, 2022: IGNITER, WORN (N569AS) - [SDR ASAA2022072039196](https://openairdocs.org/sdr/ASAA2022072039196), Jul 20, 2022: IGNITION SYS, WARNING LIGHT (N291BT) - [SDR 2022FA0000319](https://openairdocs.org/sdr/2022FA0000319), Jun 24, 2022: NONE, FAILED (N678D) - [SDR ASAA2022060838623](https://openairdocs.org/sdr/ASAA2022060838623), Jun 8, 2022: IGNITER, INOPERATIVE (N457AS) - [SDR ASAA2022053038529](https://openairdocs.org/sdr/ASAA2022053038529), May 30, 2022: IGNITER, FAILED (N920AK) - [SDR ASAA2022052938501](https://openairdocs.org/sdr/ASAA2022052938501), May 29, 2022: IGNITER, INOPERATIVE (N558AS) - [SDR ASAA2022052738500](https://openairdocs.org/sdr/ASAA2022052738500), May 27, 2022: IGNITER, DAMAGED (N587AS) - [SDR ASAA2022052538499](https://openairdocs.org/sdr/ASAA2022052538499), May 25, 2022: IGNITER, FAILED (N428AS) - [SDR ASAA2022050638229](https://openairdocs.org/sdr/ASAA2022050638229), May 6, 2022: BOOT, CRACKED (N581AS) - [SDR ASAA2022032937826](https://openairdocs.org/sdr/ASAA2022032937826), Mar 29, 2022: IGNITER, FAILED (N562AS) - [SDR ASAA2022032637796](https://openairdocs.org/sdr/ASAA2022032637796), Mar 26, 2022: LEAD, DAMAGED (N583AS) - [SDR YENA2022032800317](https://openairdocs.org/sdr/YENA2022032800317), Mar 25, 2022: NONE, NONE (N4022J) - [SDR ASAA2022031737707](https://openairdocs.org/sdr/ASAA2022031737707), Mar 17, 2022: UNKNOWN, UNKNOWN (N291BT) - [SDR ASAA2022011637175](https://openairdocs.org/sdr/ASAA2022011637175), Jan 16, 2022: IGNITER, INOPERATIVE (N929AK) - [SDR ASAA2021101836349](https://openairdocs.org/sdr/ASAA2021101836349), Oct 18, 2021: NONE, NONE (N562AS) - [SDR ASAA2021101636348](https://openairdocs.org/sdr/ASAA2021101636348), Oct 16, 2021: IGNITION LEAD, FAULTY (N461AS) - [SDR ASAA2021033034486](https://openairdocs.org/sdr/ASAA2021033034486), Mar 30, 2021: IGNITION LEAD, INOPERATIVE (N459AS) --- From OpenAirDocs.org, an independent open copy of FAA data. 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