Service difficulty report · Switch · Boeing 737890

Difficulty date
January 27, 2013
Submitted
February 5, 2013
Operation
Air carrier
Aircraft
N559AS
Make and model
Boeing 737890
Aircraft serial
35178
Aircraft time
23,652 hours, 7,151 cycles
Part
Switch
Part number
426HE138
Condition
Failed
Location
Ram Air Door
Stage of operation
TX
How discovered
V
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

LEFT RAM DOOR CLOSED TO FLIGHT POSITION AND DEFLECTOR DOOR IS CLOSED. PERFORMED BITE CK FOUND LT RAM DOOR ACT. FAULT. R & R LT RAM DOOR ACT REF 21-51-21. AT STEP 3-G-2-E OF AMM 21-51-21 ACT INSTALL, FOUND LT RAM DOOR FULL CLOSED WHILE RT RAM DOOR OPEN W/DEFLECTOR FLUSH. LT RAM DOOR ALSO FAILED STEP 3-G-3-10. VERIFIED S1051 BAD. LT RAM AIR DOOR DOES NOT GO TO FULL OPEN WITH FLAPS NOT UP. ACCOMPLISHED S1051 REPLACEMENT REF MM 27-51-63-400-801 THRU STEP F.(5). FINISHED INSTALLATION OF FLAP LIMIT SWITCH S1051, REF MM 27-51-63-400-801. ALL OPS TESTS OF S1051 SWITCH GOOD REF MM 27-51-63-820-801, SW ADJ, DIFF PRESS LIGHT TEST REF MM 27-31-00-700-811, FLAP UP LIMIT SWITCH TEST REF MM 27-31-00-700-815, POWER TRANSFER UNIT OPS TEST REF MM 29-22-00-710-801, ELEVATOR CONTROL TAB OPS TEST REF MM 27-31-00-700-815. ALL OPS TESTS GOOD.