Service difficulty report · Sensor · Boeing 7378

Difficulty date
March 3, 2023
Submitted
March 3, 2023
Operation
Air carrier
Aircraft
N36272
Make and model
Boeing 7378
Aircraft serial
31590
Aircraft time
67,927 hours, 23,655 cycles
Part
Sensor
Part number
NA
Condition
None
Location
Le Flap
Stage of operation
TO
How discovered
O
Nature of condition
O
Precautionary procedure
C

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

What was found

LE FLAP TRANSIT LIGHT ILLUMINATED OVERHEAD SLAT 1 LIGHT OFF REQUEST MEL 2704K.#1 SLAT INDICATION PROBLEM. LEADING EDGE FLAP INDICATIONS NORMAL, APPLYING MEL 2704K FOR #1 TRUE. WOULD BITE CHECK FSEU TO CONFIRM FULL EXTEND/RETRACT COMPARE RESISTANCE VALUES WITH #8 SLAT S1009. REPLACE FAULTY SLAT TRANSIT LIGHT INDICATION INOP.DDP C/W. SENSOR S994 #1 L.E. SLAT FAULT. ALSO REF WDM 27-81-12/22 AND SENSOR. THANKS DISPATCH APPROVED TECH SUPPORT UPDATE, THIS EVENT DID LOG A "DFD 271" REPORT SHOWED FULL EXTEND SENSOR TO BE "FALSE" WHEN SHOULD HAVE BEEN PC# 9107292 REF AMM 27-81-00-480-801 LEADING EDGE FLAP AND SLAT LOCKS NEED LOCKOUT TOOL TO PERFORM MAINTENANCE. REF AMM FSEU BITE FAULT HISTORY LEG 0 FAULT CODES 27-81200 AND 27-81223 INSTALLATION PC# 9107292 27-81-00-480-801 LEADING EDGE FLAP AND SLAT LOCKS INSTALLATION COLLARED CCB PER MEL 2704K OK TO CONTINUE STATION DOES NOT HAVE TOOLING.. NEED LOCKOUT TOOL TO PERFORM MAINTENANCE. REF AMM 27-81-00-480-801 LEADING EDGE FLAP AND SLAT LOCKS INSTALLATION. PERFORMED T/S IAW FIM 27-88 TASK 811 & AWD 27-81-12, FOUND LE SL EL, P2. PUSHED (CLOSE) THE STALL WARNING ASYMMETRY MODE CIRCUIT AT 1 INBOARD SENSOR S995 DEFECTIVE, REMOVED AND REPLACED SENSOR BREAKER ON THE P18-2 PANEL. REF. MEL 2704K. OPS CHECK NORMAL. PL S995 REF. AMM 27-81-11, REINSTALLED THE BULBS AT THE ASSOCIATED ACARDS REMOVED. FORWARD POSITION INDICATOR LIGHT(S) ON THE CENTER INSTRUMENT PAN

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