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Aloha Airlines 243

Printed page v. PDF page 6.

significant disbonding and fatigue damage-.which ultimately led to failure of the lap joint at S-10L and the separation of the fuselage upper lobe. Contributing to the accident were the failure of Aloha Airlines management to supervise properly its maintenance force;
Open official document at PDF page 6NTSB AAR-89/03: Aloha Airlines flight 243, N73711

Aloha Airlines 243

Printed page 5. PDF page 11.

observed a longitudinal fuselage crack. The crack was in the upper row of rivets along the S-10L lap joint, about halfway between the cabin door and the edge of the jet bridge hood. She made no mention of the observation
Open official document at PDF page 11NTSB AAR-89/03: Aloha Airlines flight 243, N73711

Aloha Airlines 243

Printed page label not indexed. PDF page 15.

about 20 inches forward of BS 540 and was not associated | with any rivet line. At the S-10L lap joint, the fracture followed the upper rivet line of the skin lap joint from a position 20 inches forward of
Open official document at PDF page 15NTSB AAR-89/03: Aloha Airlines flight 243, N73711

Aloha Airlines 243

Printed page label not indexed. PDF page 20.

brackets (shear ties). In section 43, the skin panel lap joints exist at S-4L and S-4R, S-10L and S-10R, and S-14L and S-14R in the upper lobe and at S-19L and S-19R and S-26L and S-26R in the lower lobe.
Open official document at PDF page 20NTSB AAR-89/03: Aloha Airlines flight 243, N73711

Aloha Airlines 243

Printed page label not indexed. PDF page 36.

examination. The eddy current inspection along S-10 and S-14 revealed 17 cracks along S-10L and 2 cracks along S-14R. There were no cracks along S-10R or S-14L. No attempt was made to strip the paint layers. (Appendix F provides ‘details
Open official document at PDF page 36NTSB AAR-89/03: Aloha Airlines flight 243, N73711

Aloha Airlines 243

Printed page label not indexed. PDF page 37.

striation count on several of the larger fatigue cracks from the skin along S-4R and S-10L to determine age and crack propagation rate. Although data could not be obtained from al] the cracks examined, Table 2 provides the estimated number
Open official document at PDF page 37NTSB AAR-89/03: Aloha Airlines flight 243, N73711