Service difficulty report · Exciter · Boeing 737990ER

Difficulty date
April 2, 2023
Submitted
April 6, 2023
Operation
Air carrier
Aircraft
N428AS
Make and model
Boeing 737990ER
Aircraft serial
36353
Aircraft time
25,797 hours, 8,082 cycles
Part
Exciter
Part number
106310452
Part serial
7NNEK952
Condition
Failed
Location
Nr 1 Engine
Part time
81,632 hours, 34,248 cycles
Stage of operation
TX
How discovered
V
Nature of condition
J
Precautionary procedure
K

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

What was found

ENG #1 NO LIGHT OFF DURING START. GROUNDED - YES. REMOVED AND REPLACED #1 ENG L/H EXITER AND IGNITOR, AUDIBLE TEST FAILED REF AMM'S 74-11-01 + AMM 74-21-02, SUSPECT BAD HARNESS, REQUIRES FURTHER TROUBLESHOOTING. REMOVED & REPLACED #1 IGNITION LEAD IAW AMM 74-21-01, REMOVED & REPLACED #1 IGNITION HARNESS IAW AMM 71-51-03 NO FURTHER DEFECTS NOTED.