SDR ASAA2022032437783

Service difficulty report · None · Boeing 737990ER

Difficulty date: March 24, 2022
Submitted: March 30, 2022
Operation: Air carrier
Aircraft: N483AS
Make and model: Boeing 737990ER
Aircraft serial: 36350
Aircraft time: 24,256 hours, 7,670 cycles
System (JASC): 2210 · Autopilot System
Part: None
Part number: UNKNOWN
Condition: None
Location: Unknown
Stage of operation: CL
How discovered: O
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

MCP VERTICAL SPEED SKIPS DIGITS WHEN SELECTING CLIMB (1000 FPM CLB ONE CLICK ON WHEEL WILL JUMP TO A 1500' PER MIN CLB OR DROP TO A 900 FPM CLB). AIRSPEED KNOB SKIPS DIGITS. AIRSPEED SELECTED AT 248 ONE CLICK RIGHT WITH KNOB AIRSPEED JUMPS TO 251. ALL OTHER INSTRUMENTS ACT NORMAL. GROUNDED - YES. PERF DFCS BITE IAW B737-900 FIM 22-11 TASK 801. NO FAULTS FOUND. PERF C/B RESET OF MCP IAW B737-900 AMM 22-11-34. PERF MCP INSTL TEST IAW AMM 22-11-34-740-801, NO FAULTS.