What was found
(AIR TURN BACK) AUTOPILOT WOULD NOT ENGAGE. TROUBLESHOT TO "B" AUTOPILOT ROLL COMPUTER FAULTY. SWAPPED B AND C ROLL COMPUTERS REF 22-13-01, AUTOPILOT B ENGAGEMENT CHECKS SATIS REF 22-10-00. A/C STILL CAT II RESTRICTED.
- Difficulty date
- April 23, 2006
- Submitted
- April 26, 2006
- Operation
- Air carrier
- Aircraft
- N537MC
- Make and model
- Boeing 747271C
- Aircraft serial
- 22403
- Aircraft time
- 94,354 hours, 18,447 cycles
- System (JASC)
- 2210 · Autopilot System
- Part
- Computer
- Part number
- 2590623911
- Part serial
- 79097812
- Condition
- Unserviceable
- Location
- Autopilot
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.