- Difficulty date
- December 3, 2020
- Submitted
- December 4, 2020
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35687
- Aircraft time
- 47,216 hours, 14,146 cycles
- Part
- Knob
- Condition
- Broken
- Location
- Mode Control
- Part time
- 17,216 hours, 5,129 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
HEADING KNOB IS BROKEN. GROUNDED-YES. REMOVED AND REPLACED MODE CONTROL PANEL B737-800 AMM 21-11-34 / 401. ACCOMPLISHED MODE CONTROL PANEL TEST, AMM 22-11-34-740-801, TEST PASSED. REF LP 60146743 FOR CAT 3 AUTOLAND DOWNGRADE DEFERRAL. PANEL P/N OFF: 822-1567-102 S/N OFF: 46R37NP/N ON: 4082260-939 S/N ON: 97031081.