What was found
RECENT INSTALLED APU DMM IS PROVIDING ERRONEOUS DATA. GROUNDED - YES. REPLACED DMM AND PERFORMED GOOD INSTALLATION TEST PER AMM 49-72-11.
- Difficulty date
- July 19, 2019
- Submitted
- July 19, 2019
- Operation
- Air carrier
- Aircraft
- N407AS
- Make and model
- Boeing 737900ER
- Aircraft serial
- 41731
- Aircraft time
- 26,458 hours, 8,478 cycles
- System (JASC)
- 4970 · APU Indicating System
- Part
- Module
- Part number
- 38762871
- Part serial
- AGE17778
- Condition
- Defective
- Location
- Apu
- Part time
- 2,801 hours, 5,293 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.