Service difficulty report · Indication Sys · Boeing 7374B7

Difficulty date
July 20, 2009
Submitted
July 21, 2009
Operation
Air carrier
Aircraft
N432US
Make and model
Boeing 7374B7
Aircraft serial
24554
Part
Indication Sys
Condition
Malfunctioned
Location
Te Flap
Stage of operation
AP
How discovered
O
Nature of condition
N
Precautionary procedure
L

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

What was found

ON APPROACH TO ORD, CAPTAIN REPORTED THE FLAPS WOULD NOT EXTEND PAST 1 DEGREE. FLAP POSITION INDICATOR SHOWED ASYMMETRY BUT AIRCRAFT DID NOT EXHIBIT SIGNS OF CONDITION. FLIGHT ACCOMPLISHED A GO-AROUND AND FLAPS WERE EXTENDED TO 15 DEGREES USING ALTERNATE EXTENSION. FLIGHT LANDED WITHOUT FURTHER INCIDENT. AN EMERGENCY WAS DECLARED. MAINTENANCE TROUBLESHOT PER MM 27-51-00. VISUAL INSPECTION REVEALED NO FAULTS. BYPASS VALVE REVEALED NO FAULTS. FLAP MOTOR REVEALED NO FAULTS. FLAP POSITION INDICATOR SHOWED SLIGHT SPLIT. RESET INDICATOR. PERFORMED OPERATIONAL CHECK PER MM 27-51-00-5-715-001. NO FAULTS AND NO RECENT HISTORY NOTED.

More about the Boeing 737-4B7