Service difficulty report · Skin · Boeing 737900

Difficulty date
February 14, 2022
Submitted
February 14, 2022
Operation
Air carrier
Aircraft
N30401
Make and model
Boeing 737900
Aircraft serial
30118
Aircraft time
56,841 hours, 23,396 cycles
Part
Skin
Part number
NA
Condition
Cracked
Location
Rh 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 RIGHT-HAND HORIZONTAL STABILIZER LOWER INSPAR SKIN AT STA 157.10 17" FWD FROM REAR SPAR I/B OF DRAIN HOLE , CRACK LENGTH IS 0.787" . REF. AAR N/R:9644947 HOLE , CRACK LENGTH IS 0.787" . REF. AAR N/R:9644947.REQUIRES CYCLE INTERVALS (EXTERNAL).:EXTERNAL LOW FREQUENCY EDDY CURRENT 56,000 FLIGHT CYLCES. REPEAT INSPECTIONS: DETAILED VISUAL INSPECTION AT 9,000 FLIGHT (LFEC) INSPECTION AT 9,000 FLIGHT CYCLE INTERVALS. THRESHOLD IS ONE CRACK FOUND AT THE RIGHT-HAND HORIZONTAL STABILIZER LOWER INSPAR SKIN AT STA 157.10 17" FWD FROM REAR SPAR I/B OF DRAIN DIP 55-DIP MANUAL REFERENCE NEEDS TO BE INCLUDED IN THE TEXT HOLE , CRACK LENGTH IS 0.787" IAW SRM 55-10-01 REPAIR 11. REQUIR T CYCLE INTERVALS (EXTERNAL).: EXTERNAL LOW FREQUENCY EDDY CURRE IS 56,000 FLIGHT CYLCES. IAW SRM 55-10-01-2R-11. REF. AAR N/R:96 ES REPEAT INSPECTIONS: DETAILED VISUAL INSPECTION AT 9,000 FLIGH NT (LFEC) INSPECTION AT 9,000 FLIGHT CYCLE INTERVALS. THRESHOLD 44947 FOR DETAILS REPAIRED RIGHT-HAND HORIZONTAL STABILIZER LOWER INSPAR SKIN AT STA 157.10 17" FWD FROM REAR SPAR I/B OF DRAIN 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 QC REVIEW INSPECTIONS CREATED BY AUTODIP PENDING AIRCRAFT RECORDS AUDIT & UPDATE.