Service difficulty report · Skin · Boeing 737924

Difficulty date
February 14, 2022
Submitted
February 14, 2022
Operation
Air carrier
Aircraft
N30401
Make and model
Boeing 737924
Aircraft serial
30118
Aircraft time
56,841 hours, 23,396 cycles
Part
Skin
Part number
NA
Part serial
NA
Condition
Cracked
Location
Lh Horiz Stab
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

ONE CRACK FOUND AT THE LEFT-HAND HORIZONTAL STABILIZER LOWER INSPAR SKIN AT STA 166.30, 17" FROM REAR SPAR I/B OF DRAIN HOLES, CRACK LENGTH IS 0.984" . REF. AAR N/R:9649646 , CRACK LENGTH IS 0.984" . REF. AAR N/R:9649646.REQUIRES REPEAT INTERVALS (EXTERNAL):EXTERNAL LOW FREQUENCY EDDY CURRENT (LFEC) FLIGHT CYLCES INSPECTIONS: DETAILED VISUAL INSPECTION AT 9,000 FLIGHT CYCLE INSPECTION AT 9,000 FLIGHT CYCLE INTERVALS.THRESHOLD IS 56,000 ONE CRACK FOUND AT THE LEFT-HAND HORIZONTAL STABILIZER LOWER INSPAR SKIN AT STA 166.30, 17" FROM REAR SPAR I/B OF DRAIN HOLES DIP 55-DIP MANUAL REFERENCE NEEDS TO BE INCLUDED IN THE TEXT , CRACK LENGTH IS 0.984".REQUIRES REPEAT INSPECTIONS: (EXTERNAL): EXTERNAL LOW FREQUENCY EDDY CURRENT (LFEC) FLIGHT CYLCES. IAW SRM 55-10-01-2R-11.REF AAR N/R:9649646. DETAILED VISUAL INSPECTION AT 9,000 FLIGHT CYCLE INTERVALS INSPECTION AT 9,000 FLIGHT CYCLE INTERVALS. THRESHOLD IS 56,000 FOR DETAILS. REPAIRED LEFT-HAND HORIZONTAL STABILIZER LOWER INSPAR SKIN AT STA 166.30, 17" FROM REAR SPAR I/B OF DRAIN HOLES PLACED ON DIP TO PERFORM A DETAIL VISUAL AND EXTERNAL LOW POWER TOMC-APPROVAL FROM SC1ELBYC COMMENT EDDY CURRENT INSPECTION AFTER ANT INITIAL THRESHOLD 56,000 TOTAL FLIGHT CYCLES AND REPEAT EVERY 9000 FLIGHT CYCLES AFTERWARDS PER SRM 55-10-01-2R-11 QC REVIEW INSPECTIONS CREATED BY AUTODIP PENDING AIRCRAFT RECORDS AUDIT & UPDATE.