# AD 69-07-02: Aileron Balance Unit

- Type: Airworthiness directive
- Status: Current
- Products: Pilatus PC-6, PC-6-H1, PC-6-H2, PC-6/350, PC-6/350-H1, PC-6/350-H2, PC-6/A, PC-6/A-H1, PC-6/A-H2, PC-6/B-H2, PC-6/B1-H2 and PC-6/C-H2
- Effective: April 1, 1969
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-743
- Registered aircraft: 3 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/62A64F00672FF17686256A45006C1273.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/69-07-02

## The airworthiness directive

69-07-02 PILATUS: Amdt. 39-743. Applies to Model PC-6 Airplanes Serial Nos. 1 through 701, 2001 through 2018, 2023, 2025 through 2029, 2040 and 2041.

Compliance required as indicated unless already accomplished.

To prevent structural damages to the aileron mass balance unit P/N 6106.11, due to internal corrosion, accomplish the following:

  (a) Within the next 10 hours' time in service after the effective date of this AD, and thereafter at intervals not to exceed 10 hours' time in service from the last inspection, inspect the external surface of the mass balance support arms for evidence of corrosion (indicated by blistering of paint or slight discoloration).

  (b) If evidence of corrosion is detected during the inspection prescribed in paragraph (a), before further flight, replace the aileron mass balance unit P/N 6106.11 with a modified aileron mass balance unit P/N 6106.11 (which is identified by a 1/2-inch diameter yellow colored marking), or with a new aileronmass balance unit P/N 111.45.08.001, in accordance with Pilatus Service Bulletin No. 89, dated November 1968 or later Swiss Federal Air Office approved revision or an FAA approved equivalent.

  (c) The repetitive inspections required by paragraph (a) may be discontinued after the modified or new aileron mass balance unit has been installed.

This amendment becomes effective April 1, 1969.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 7A15](https://openairdocs.org/tcds/7A15): Pilatus Aircraft Ltd.; names 12 of 15 models: PC-6/350-H1, PC-6/B-H2, PC-6/A-H2, PC-6/C-H2, PC-6, PC-6/A-H1, PC-6-H2, PC-6-H1…

## 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: 3 (3 by airframe model, 0 by engine model)
- Makers: Pilatus 3

Models with the most aircraft:

- [Pilatus PC-6/B1-H2](https://openairdocs.org/model/pilatus-pc-6-b1-h2): 2 aircraft (airframe model)
- [Pilatus PC-6](https://openairdocs.org/model/pilatus-pc-6): 1 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/69-07-02/models.md
Every aircraft: https://openairdocs.org/ad/69-07-02/aircraft.md

Its text cites no advisory circulars or STCs.

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