Service difficulty report · Thrust Reverser · Boeing 7474B5F
FAA SDR system
- Difficulty date
- November 30, 2025
- Submitted
- December 2, 2025
- Operation
- Air carrier
- Make and model
- Boeing 7474B5F
- Aircraft serial
- 32809
- Aircraft time
- 86,315 hours, 15,127 cycles
- Engine
- Pwa PW4056
- Engine time
- 86,218 hours, 14,060 cycles
- Part
- Thrust Reverser
- Condition
- Delaminated
- Location
- Zone 400
- Stage of operation
- IN
- How discovered
- V
- 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
THRUST REVERSER INBD NR 4 ENG DELAMINATED AT 10 O'CLOCK POSITION. REMOVED AND REPLACED NR 4 INBD THRUST REVERSER IAW AMM 78-31-01.100278273: INBD THRUST REVERSER NR 4 ENG CASCADE VANE DEPARTED AIRCRAFT AT 10 O'CLOCK POSITION. REMOVED AND REPLACED UPPER NON-LOCKING ACTUATOR ASSY PER B747-400 AMM 78-31-17 CHECKS GOOD. THIS ACTION CLEARS DMI 100279021 MX PROCEDURES C/W PLACARDS REMOVED.