SDR ASAA1058547

Service difficulty report · Unknown · Boeing 737890

Difficulty date: November 25, 2010
Submitted: November 30, 2010
Operation: Air carrier
Aircraft: N560AS
Make and model: Boeing 737890
Aircraft serial: 35179
Aircraft time: 16,308 hours, 5,117 cycles
Engine: Cfmint CFM567B27
System (JASC): 7400 · Ignition System
Part: Unknown
Condition: Malfunctioned
Location: Nr 1 Engine
Stage of operation: IN
How discovered: O
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

WHILE ACCOMPLISHING T/C 78273000 FOUND FAULT LONG TIME MSG NR 74-30971 (THE APL INPUT VOLTAGE FOR THE L EXCITER " IGN 1 " IS OUT OF RANGE) AT NR1 ENG. DEFER FOR 450 FLIGHT HOURS PER T/C 78273000. PERFORMED FMV ENGINE NR 1 "RECENT FAULTS" AND "FAULT HISTORY". NO FAULTS FOUND PER AMM 74-00-00. FOLLOWED FIM TASK 74-21-00-810-801. STEP E(C). SUSPECT A MOMENTARY LOSS OF ELECTRICAL POWER TO THE LEFT EXCITER OR EEC OR AN INTERMITTENT FAULT.