SDR CALA2026092919963

Service difficulty report · Proximity Sensor · Boeing 7379

Difficulty date: September 25, 2026
Submitted: September 29, 2026
Operation: Air carrier
Aircraft: N37473
Make and model: Boeing 7379
Aircraft serial: 67749
Aircraft time: 304 hours, 110 cycles
System (JASC): 2751 · Trailing Flap Position Indicating System
Part: Proximity Sensor
Part number: 8020702
Condition: Faulted
Location: Flap Sys
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: A

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

What was found

INTERMITTENT LE FLAP EXT LIGHT AND OVHD FLAP 1 FULL XTND INDICATOR, SPEED CMD DROPS TO .63. ON ARRIVAL FSEU BITE FAULTED F1 PROX EXTEND SWITCH, MSG 27-81217. ON GND, RAN FLAPS A COUPLE OF TIMES, FULL DOWN & UP. ALL NORMAL. REMOVED AND REPLACED LE FLAP 1, EXTEND SENSOR S169, ALL TARGETS CHECKED GOOD IAW AMM 27-88-11-400-802, 27-88-11-700-801.

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