# AD 65-19-01: Main Rotor Blade Retention Bolts

- Type: Airworthiness directive
- Status: Current
- Products: Air & Space America 18A
- Effective: August 25, 1965
- Published: August 25, 1965
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-122
- Registered aircraft: 6 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F653DE5AE974572186256A340047D763.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/65-19-01

## The airworthiness directive

65-19-01 AIR and SPACE: Amdt. 39-122 Part 39 Federal Register August 25, 1965. Applies to Model 18A Gyroplanes, Serial Numbers 18-7 through 18-28.

Compliance required before further flight unless already accomplished.

To prevent further failures of main rotor blade retention bolts while supporting the blade near the tip to prevent contact with the droop stops, replace three main rotor blade retention bolts, P/N RO-U18-2136-11, and nuts, P/N MS-20364-1614, with new main rotor blade retention bolts and nuts furnished by the manufacturer after August 4, 1965, and torque the nuts to 45 - 50 foot pounds dry thread torque value.

This directive effective upon publication in the Federal Register for all persons except those to whom it was made effective immediately by telegram dated August 10, 1965.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1H17](https://openairdocs.org/tcds/1H17): TWMCC Leasing LLC; names 1 of 1 models: 18A

## 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: 6 (6 by airframe model, 0 by engine model)
- Makers: Air & Space America 6

Models with the most aircraft:

- [Air & Space America 18A](https://openairdocs.org/model/air-space-america-18a): 6 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/65-19-01/models.md
Every aircraft: https://openairdocs.org/ad/65-19-01/aircraft.md

Its text cites no advisory circulars or STCs.

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