Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
August 9, 2023
Submitted
August 24, 2023
Operation
Air carrier
Aircraft
N420WN
Make and model
Boeing 7377H4
Aircraft serial
29825
Aircraft time
72,005 hours, 42,658 cycles
Part
Stiffener
Part number
UNKNOWN
Condition
Cracked
Location
Zn 300 Stabilize
Stage of operation
IN
How discovered
9
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 HAND HORIZONTAL STABILIZER INSPAR RIB; AT STABILIZER STATION 120.30; 4TH VERTICAL STIFFENER IS CRACKED.<[01] REMOVED PANEL 333CB FOR ACCESS IAW SOPM 20-50-01.;[02] REMOVED BALANCE BAY #2 ELEVATOR HINGE HALF IAW AMM 27-31-41-000-8012. F. (2).;[03] VALIDATED SRM 55-10-09-2R-4. CUT AND REMOVED DAMAGE FROM VERT. STIFFENER AND WEBONRIB ASSY. IAW SRM 55-10-09-2R-4; PARA. 4. AND FIG.202.;[04] VERIFIED COMPLETION OF CORRECTIVE ACTIONS 1-3.<BR>VALIDATED APPLICABILITY REPAIR PER SRM 55-10-09-2R-4.;[05] COMPLETED STEP 5.;[06] REPAIRED L/H HORIZONTAL INSPAR RIB 4TH VERITCAL RIB IAW SRM 55-10-09-2R-4;[07] EDIT: CORRECTIVE ITEM 6. REPAIRED L/H HORIZONTAL INSPAR RIB 4TH VERITCAL STIFFNER AT STAB STA 120.30 IAW SRM 55-10-09-2R-4;[08] INSPECTED AND VERIFIED CORRECTIVE ACTIONS. JOB COMPLETE.;[09] VERIFIED MEASUREMENTS TABLE

More about the Boeing 737-7H4