AD 99-04-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Schweizer Aircraft Corporation | 269C-1 | Airworthiness Directives; Schweizer Aircraft Corporation Model 269C-1 Helicopters |
Unsafe Condition
Debonding and corrosion have occurred on certain main rotor blade abrasion strips where they attach to the blade skin, leading to potential loss of the abrasion strip and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the adhesive bead around the perimeter of each abrasion strip for erosion, cracks, or blisters; visually inspect the bond line between each abrasion strip and blade skin for voids, separation, or lifting; perform a tap (ring) test for debonding or hidden corrosion voids. Remove and replace blades with unairworthy abrasion strips.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 50 hours time-in-service (TIS), or within 90 calendar days after the effective date of this AD, whichever is earlier, or prior to installing an affected replacement blade, and thereafter at intervals not to exceed 50 hours TIS from the date of the last inspection or replacement installation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Schweizer Aircraft Corporation Model 269C-1 helicopters with main rotor blades P/N 269A1185-1, serial numbers S222, S312, S313, S325, S326, S327, S339, S341, S343, S346, S347, S349 through S367, S369 through S377, S379 through S391, S393, S394, S395, S397, S399, S401 through S417, S419 through S424, S426 through S449, S451 through S507, S509 through S513, S516 through S527, S529 through S540, S542, S544 through S560, S562 through S584, S586 through S595, S597 though S611, S620 through S623, S625, S628, S633, S641 through S644, S646, S653, S658, S664, S665, and S667.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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