Service difficulty report · Skin · Boeing 737900

Difficulty date
August 13, 2022
Submitted
August 16, 2022
Operation
Air carrier
Aircraft
N71411
Make and model
Boeing 737900
Aircraft serial
30128
Aircraft time
56,444 hours, 22,968 cycles
Part
Skin
Part number
182A40011
Condition
Cracked
Location
Sta120.50-129.5
Stage of operation
IN
How discovered
O
Nature of condition
O
Precautionary procedure
K

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

What was found

LEFT HORIZONTAL STAB LOWER SKIN - CRACK FOUND (2 IN LENGTH) BE TWEEN STAB STA 120.50 AND 129.50 AND 1 INCH FWD OF THE REAR SPAR . (6 INCHES FROM THE AFT INBOARD CORNER OF THE EXISTING REPAIR). REF NON-ROTUINE 000803467. EXISTING REPAIR DOUBLER AT STAB STA. 129.5 TO 138.7 REF ELB 7321548 WILL BE INCORPERATED WITH THIS RE PAIR. INCORPERATED EXISTING REPAIR DOUBLER THAT WAS REMOVED. ISSUED DI DETAIL VISUAL INSPECTION AND EXTERNAL (LFEC) INSPECTION OF REPAI AFTER SEE SRM 55-10-01-01-2R-11 REPAIR 11 PAGE 7 TABLE 204 FOR I ROUTINE 000803467 FOR ALL WORK ACCOMPLISHED. P TO READ "INSPECTION THRESHOLD 56,000 FLIGHT CYCLES FOR A R DOUBLER. REPEAT INSPECTIONS EVERY 9000 FLIGHT CYCLES THERE NSPECTION METHODS." REF SRM 55-10-01-2R-11 REPAIR 11. SEE NON- REMOVED EXISTING REPAIR DOUBLER FROM STAB STA 129 TO 138.7 REF 7321548. REPAIRED SKIN AND INSTALLED REPAIR DOUBLER WHICH