What was found
AFTER REPLACING F.C.U & LUBE MODULE DIFF. PRESS INDICATOR . FAULT CODE (MX MSG) 4931175 DISPLAYED "FCU RESOLVER CIRCUIT SHOWS BAD". GROUNDED YES. R&R APU IGNITION UNIT PER M/M 49 41 31 OPS CHECKS GOOD.
- Difficulty date
- February 4, 2009
- Submitted
- February 6, 2009
- Operation
- Air carrier
- Aircraft
- N579AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35187
- Aircraft time
- 7,577 hours, 2,226 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Ignition Unit
- Part number
- 38880585
- Part serial
- 050218052944
- Condition
- Faulty
- Location
- Apu
- Part time
- 1,946 hours, 520 cycles
- 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.