# AD 75-12-05: Support Struts and Longerons

- Type: Airworthiness directive
- Status: Current
- Products: Funk Funk C, B, B75L (Army UC-92) and B85C
- Effective: June 5, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2225
- Registered aircraft: 87 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/174BB5EB7293B62A86256A380059BC19.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/75-12-05

## The airworthiness directive

75-12-05 MCCLISH (Funk): Amendment 39-2225: Applies to all McClish (Funk) Model B, B75L, B85C and Funk C Aircraft.

1. Affects wing forward external support struts and rear fuselage lower longerons at the tail post.

a. Within the next ten hours' time in service or one month, whichever occurs first, after the effective date of this Airworthiness Directive, unless accomplished within the last 90 hours in service or 11 months, accomplish the following:

b. Inspect the wing forward external support struts at the lower end where the aileron cable enters the strut, for corrosion and cracks.

c. Inspect the lower fuselage longerons at the tail post and weldments in the rudder hinge post area, for corrosion and cracks.

2. The inspection specified in paragraph (1) must be repeated at intervals not to exceed 100 hours' time in service or 12 months, whichever occurs first.

3. Before further flight, all corroded or cracked parts must be replaced with the same partnumber or with approved equivalent parts, or repaired in accordance with an approved repair procedure.

4. Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region may adjust the inspection time in this Airworthiness Directive. Repairs and equivalent parts must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. Substantiating data for repairs and equivalent parts must be submitted by an owner or operator through an FAA Maintenance Inspector.

This amendment is effective June 5, 1975.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-715](https://openairdocs.org/tcds/A-715): Funk Aeroplane Company; names 3 of 3 models: B75L (Army UC-92), B85C, B
- [TCDS TC 2-564](https://openairdocs.org/tcds/TC%202-564): Funk Aircraft Company; names 1 of 1 models: Funk C

## 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: 87 (87 by airframe model, 0 by engine model)
- Makers: Funk 86, Stearman 1

Models with the most aircraft:

- [Funk B85C](https://openairdocs.org/model/funk-b85c): 61 aircraft (airframe model)
- [Funk B](https://openairdocs.org/model/funk-b): 14 aircraft (airframe model)
- [Funk B75L](https://openairdocs.org/model/funk-b75l): 11 aircraft (airframe model)
- [Stearman B](https://openairdocs.org/model/stearman-b): 1 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/75-12-05/models.md
Every aircraft: https://openairdocs.org/ad/75-12-05/aircraft.md

Its text cites no advisory circulars or STCs.

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