SDR ASAA2022052638451

Service difficulty report · Autothrottle Sys · Boeing 7379

Difficulty date: May 26, 2022
Submitted: May 31, 2022
Operation: Air carrier
Aircraft: N972AK
Make and model: Boeing 7379
Aircraft serial: 43389
Aircraft time: 597 hours, 167 cycles
System (JASC): 2230 · Auto Throttle System
Part: Autothrottle Sys
Part number: UNKNOWN
Condition: Intermittent
Location: Unknown
Stage of operation: NR
How discovered: V
Nature of condition: J
Precautionary procedure: K

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

What was found

AUTOTHROTTLE WILL NOT STAY ENGAGED. GROUNDED - YES. PERFORMED B737-9 IFIM 22-31-00-810-801, DFCS BITE FOUND FAULT MSG 22-31523 ON FLT LEG 7, THEN PERFORMED IFIM 22-31-00-810-874 PROCEDURE ON OMF HAD NO FAULT ACTIVE, AT BITE TEST GOOD, COULD NOT DUPLICATE DEFECT, NO MX HISTORY.

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