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SDR ASAA2022050838247

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Service difficulty report · Switchpack · Boeing 737890

FAA SDR system

Difficulty date
May 8, 2022
Submitted
May 10, 2022
Operation
Air carrier
Aircraft
N508AS
Make and model
Boeing 737890
Aircraft serial
35691
Aircraft time
50,091 hours, 14,707 cycles
Engine
Cfmint CFM567B27
System (JASC)
7600 · Engine Controls
Part
Switchpack
Part number
254A115014
Part serial
1349
Condition
Faulty
Location
Above Nosewheel
Part time
2,831 hours, 785 cycles
Stage of operation
IN
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

TAKE OFF WARNING HORN #2 THROTTLE DOES NOT SOUND ABOVE 73 TRA. #1 OPS NML AMM 31-51-00. GROUNDED - YES. DISCONNECTED CONN D11132P, VERIFIED RH AUTOTHROTTLE SWITCHPACK SWITCH S8 PINS 16-17 CLOSES AT 52 DEG TRA AND OPENS AT APPROX 74 DEG TRA. REPLACED RH AUTOTHROTTLE SWITCHPACK REF B737-800 AMM 76-11-07-400-802-F00/AMM 76-11-07/401 & COMPLETED A/T SWITCHPACK TESTS REF AMM 76-11-07/501. ALL TESTS PASS. RECONNECTED CONN D11132P. #2 THROTTLE TAKE-OFF WARNING HORN OPS NORMAL REF AMM 31-51-00.