- Difficulty date
- July 30, 2021
- Submitted
- August 3, 2021
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41727
- Aircraft time
- 19,448 hours, 6,201 cycles
- Part
- Fmc
- Part number
- 1762000101
- Part serial
- 010494
- Condition
- Intermittent
- Location
- Right
- Part time
- 19,448 hours, 6,201 cycles
- Stage of operation
- NR
- 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
RH FMC CONTINUALLY DROPS OFFLINE. GROUNDED - YES. CONFIRMED DEFECT. RESET 2 CB FOR FMCS #2, CYCLING POWER HAD NO EFFECT. REMOVED AND REPLACED RH/#2 FMC IAW B737-900 AMM 34-61-02-000/400-801. PERFORMED PERF FACTORS ADJ IAW AMM 34-61-00-800-801, OPS TEST IAW AMM 34-61-00-710-801, DFCS LRU REPLACE TEST IAW AMM 22-11-00-740-815. ALL TESTS PASS. NO OTHER DEFECTS NOTED.