Service difficulty report · Circuit Card · Boeing 737401

Difficulty date
August 29, 1999
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N412US
Make and model
Boeing 737401
Aircraft serial
23881
Part
Circuit Card
Part number
405FW504B
Condition
Failed
Location
Nlg
Stage of operation
AP
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

IND - FLT 696 - AS LANDING GEAR WAS LOWERED IN PREPARATION FOR LANDING AT IND, THE CREW RECEIVED A NOSE GEAR UNSAFE LIGHT. CREW RECYCLED THE LANDING GEAR THREE TIMES AND ACCOMPLISHED A TOWER FLYBY. TOWER STATED NOSE WHEEL LOOKED DOWN BUT CAPTAIN CHECKED SCOPE AND GEAR DID NOT SEEM TO LINE UP. CREW CYCLED GEAR TWO MORE TIMES AND CHECKED SCOPE AGAIN. GEAR AGAIN DID NOT SEEM TO LINE UP. AFTER SECOND FLYBY, GEAR LOOKED DOWN AGAIN, BUT STILL HAD UNSAFE LIGHT. CREW DECLARED AN EMERGENCY AND THE CABIN WAS PREPPED FOR AN EMERGENCY. FLIGHT LANDED WITHOUT FURTHER INCIDENT. THE NOSE GEAR WAS PINNED AND THE AIRCRAFT TAXIED TO THE GATE. MAINTENANCE REMOVED AND REPLACED THE M1215 AND M1214 (P/N 8-060-02) PRINTED CIR