Service difficulty report · Sensor · Boeing 75728A

Difficulty date
February 12, 2021
Submitted
February 14, 2021
Operation
Air carrier
Aircraft
N971FD
Make and model
Boeing 75728A
Aircraft serial
26277
Aircraft time
50,772 hours, 17,447 cycles
Part
Sensor
Condition
Binding
Location
R1 Door
Stage of operation
LD
How discovered
O
Nature of condition
N
Precautionary procedure
O

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

What was found

R1 DOOR LEVER PHYSICALLY MOVED ABOVE THE PANEL THAT COMES OUT WHEN THE DOOR IS CLOSED, UPON LANDING BLOCK IN MESSAGE/SUMMARY CAME UP BEFORE LEAVING THE RUNWAY. FAULT SEEMS TO OCCUR DURING CLIMBOUT AND PRESSURIZATION. RMVD SLIDE COVER AND INSPECTED FOR POSSIBLE SLIDE/LANYARD INTERFERENCE AND BINDING, NO FINDINGS. INSPECTED DOOR LATCH CAMS, FITTINGS AND MECHANISMS FOR WEAR AND SECURITY, NO FINDINGS, EVERYTHING WAS SECURE AND OPS NML. DOOR WAS FLUSH AND FAIRED WHEN CLOSED. PERF PUSH PULL TEST FOR DOOR CLOSING/OPENING AND WAS WITHIN LIMITS. REF AMM 52-11-00-6. WHEN COMPARING TO L1, FOUND THE DOOR SENSOR PLUNGER PROTRUDING MORE THAN L1 WITH THE PLUNGER BOTTOMED OUT. PUT A CRUSH INDICATOR IN R1 SENSOR, CLOSED DOOR AND IT FLATTENED. SUSPECT POSSIBLE BINDING BETWEEN LATCH CAM AND DOOR SENSOR CAUSING DOOR HANDLE TO MIGRATE DURING PRESSURIZATION. ADJ R1 DOOR SNSR, OPS NML - REF AMM 52-71-00-5.

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