SDR AALA201905209006

Service difficulty report · Unknown · Boeing 737823

Difficulty date: May 19, 2019
Submitted: May 21, 2019
Operation: Air carrier
Aircraft: N973AN
Make and model: Boeing 737823
Aircraft serial: 29548
Aircraft time: 53,649 hours, 21,947 cycles
System (JASC): 2210 · Autopilot System
Part: Unknown
Condition: Malfunctioned
Location: Autopilot Sys
Stage of operation: DE
How discovered: O
Nature of condition: J
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AIRCRAFT NOT GROUNDED: PILOT REPORTS AT TOP OF DESCENT FL350 IN VNAV PATH, ACFT NOSED DOWN AND OVERSPEED WARNING ACTIVATED. WARNING ON 1 TO 2 SECONDS. MAINTENANCE ACCOMPLISHED DFCS BITE, NO CURRENT FAULTS, NO PREVIOUS FAULTS, AP SYSTEM OK IAW FIM 22-11, TASK 801.