SDR ASAA2014042007549

Service difficulty report · Autothrottle Sys · Boeing 737890

Difficulty date: April 20, 2014
Submitted: April 22, 2014
Operation: Air carrier
Aircraft: N517AS
Make and model: Boeing 737890
Aircraft serial: 35197
Aircraft time: 20,579 hours, 6,187 cycles
System (JASC): 2230 · Auto Throttle System
Part: Autothrottle Sys
Condition: Malfunctioned
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

AUTOTHROTTLE WILL NOT ENGAGE IN FLIGHT. ACFT GROUNDED. ACCOMPLISHED BITE OF AUTOTHROTTLE IAW FIM 22-31, TASK 801. FOUND LT ADIRU NO DATA FAULT 22-31004. RESET LT ADIRU CIRCUIT BREAKERS, IAW AMM 20-60-01-860-801. ACCOMPLISHED BITE TEST OF ADIRU`S LT & RT, NO FAULTS NOTED. ACCOMPLISHED AUTOTHROTTLE BITE, NO CURRENT FAULTS NOTED, INTERMITTENT FAULT-OK FOR CONT SERVICE - NO HISTORY PAST 30 DAYS.