# AD 48-45-01: Wing Spar Inspection

- Type: Airworthiness directive
- Status: Current
- Products: Fairchild Hiller M-62A, M-62A-3, M-62A-4, M-62B and M-62C
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 219 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/210ECF37AADAAA7786256A38004EF3B1.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/48-45-01

## The airworthiness directive

48-45-01 FAIRCHILD: Applies to All M-62 Series Aircraft.

Compliance required at each annual inspection.

  (1) Inspect plywood butt plates for separation from wing spar ends. Remove only if loose and inspect spar end for rot which requires repair or replacement. Separation of spar laminations does not require replacement if the glue joints between spar webs and caps are sound. Glue new butt plates to spar ends working glue into any cracks between laminations.

  (2) Cut a total of sixteen 1/2-inch diameter inspection holes in wing lower skin. These should be centered at the front edges of both spars at four approximately equally spaced sparwise stations in each outer panel. Use caution to avoid cutting the spars and ribs. Inspect spars for rot and separation of the plywood webs from the caps. Deteriorated parts should be scrapped or repaired. Dope fabric patches over holes.

  (3) Provides 1/4-inch drain holes in lower skin with centers not more than 1/4 inch from front face of spars and from outer edge of each rib wherever holes are missing or have greater spacing. Clean out all dirt built up above edges of holes to insure complete drainage. Install seaplane grommets at all drain holes in areas splashed by water from landing wheels.

This supersedes AD 48-07-04.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-724](https://openairdocs.org/tcds/A-724): Fairchild Hiller Corporation; names 5 of 5 models: M-62B, M-62A, M-62A-4, M-62A-3, M-62C

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 219 (219 by airframe model, 0 by engine model)
- Makers: Fairchild 216, Fairchild Funk 3

Models with the most aircraft:

- [Fairchild M-62A](https://openairdocs.org/model/fairchild-m-62a): 116 aircraft (airframe model)
- [Fairchild M-62A-3](https://openairdocs.org/model/fairchild-m-62a-3): 56 aircraft (airframe model)
- [Fairchild M-62C(PT-23A)](https://openairdocs.org/model/fairchild-m-62c-pt-23a): 32 aircraft (airframe model)
- [Fairchild M-62A-4](https://openairdocs.org/model/fairchild-m-62a-4): 10 aircraft (airframe model)
- [Fairchild Funk M62C F-23A](https://openairdocs.org/model/fairchild-funk-m62c-f-23a): 3 aircraft (airframe model)
- [Fairchild PT-26 M62A3](https://openairdocs.org/model/fairchild-pt-26-m62a3): 1 aircraft (airframe model)
- [Fairchild M-62B](https://openairdocs.org/model/fairchild-m-62b): 1 aircraft (airframe model)

All 7 models: https://openairdocs.org/ad/48-45-01/models.md
Every aircraft: https://openairdocs.org/ad/48-45-01/aircraft.md

Its text cites no advisory circulars or STCs.

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