- Difficulty date
- June 1, 2016
- Submitted
- June 3, 2016
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35197
- Aircraft time
- 28,773 hours, 8,574 cycles
- Part
- Gearbox
- Part number
- 38007021
- Part serial
- P8069
- Condition
- Failed
- Location
- Apu
- Part time
- 9,837 hours, 12,617 cycles
- Stage of operation
- TX
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE SERVICING APU. FOUND AFT BEARING RETURN TUBE FRACTURED. ACFT GROUNDED. SIGMA SEAL REMOVED AND REPLACED IAW AMM 49-15-11-000-801 AND AMM 49-15-11-400-801. REMOVED APU IAW AMM 49-11-00-000-803. INSTALLED APU IAW AMM 49-11-00-400-803. LEAK AND OPS CHECK GOOD.