SDR UALA2012032201816

Service difficulty report · Switch · Boeing 757222

Difficulty date: March 21, 2012
Submitted: April 20, 2012
Operation: Air carrier
Aircraft: N567UA
Make and model: Boeing 757222
Aircraft serial: 26673
Aircraft time: 64,178 hours, 23,660 cycles
Engine: Pwa PW2037
System (JASC): 2781 · Leading Edge Slat Position Indicating System
Part: Switch
Condition: Faulty
Location: Le Slat
Stage of operation: NR
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

FSEU 1 SHOWS SLAT LOSS FAULT. REPLACED FSEU 1, NO HELP. RE-INSTALLED ORIGINAL UNIT. FLAPS AND SLATS ARE LOCKED IN NORMAL AND ALTERNATE MODES. REF FIM 27-81-00, SUSPECT A SLAT POSITION TRANSMITTER OR A SLAT LOSS POSITION SENSOR. ACCMP'D TROUBLESHOOTING PER FIM 27-81-00 UP TO FIG 105 (SHEET 3) BLOCK 4. PIN 7 AT D41 828P IS 1 OHM NEED TO CONT TO BLK 43 MOST LIKELY NEEDS NEW SLAT LOSS SENSING SWITCH S10338. REPLACED INBD SLAT B LOSS SWITCH AND RESET TRIGGER AT SLAT #9.