SDR SWAA2019051332548

Service difficulty report · Sensor · Boeing 7377BD

Difficulty date: May 11, 2019
Submitted: May 13, 2019
Operation: Air carrier
Aircraft: N7750A
Make and model: Boeing 7377BD
Aircraft serial: 36716
Aircraft time: 37,849 hours, 18,672 cycles
System (JASC): 2751 · Trailing Flap Position Indicating System
Part: Sensor
Part number: 0270331
Part serial: 3687
Condition: Faulty
Location: Lt Wing
Stage of operation: CL
How discovered: O
Nature of condition: N
Precautionary procedure: A

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

What was found

AIR TURNBACK/DECLARED EMERGENCY, ON DEPARTURE, FLAP RETRACTION RIGHT TRAILING SHOWED EP ASYMMETRY WITH CONTROL INPUT. LEADING EDGE DEVICES SHOWED NO ASYMMETRY RIGHT NEEDLE BETWEEN 1 AND 2. LEFT NEEDLE SHOWED SELECTED POSITION 1 (NORMAL) ON TAXI TO GATE NEEDLES SHOWED NORMAL. PSEU ILLUMINATED OR GROUND. R&R NR 4 SKEW SENSOR PER MM.

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