# AD 84-12-51: Main Rotor Blade Inspection

- Type: Airworthiness directive
- Status: Current
- Products: Westland Helicopters Westland 30 Series 100
- Effective: September 11, 1984
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-4904
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FE5C6853F0DCA2E486256A4D0074B43E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/84-12-51

## The airworthiness directive

84-12-51 WESTLAND HELICOPTERS LIMITED: Amendment 39-4904. Applies to Westland Model 30 Series 100 helicopters certificated in all categories.

Compliance is required as indicated (unless already accomplished).

To prevent possible hazards in flight associated with cracking of the main rotor blades, accomplish the following:

  (a) Before the next flight and thereafter before the first flight of each day, visually inspect the main rotor blades in accordance with Westland Service Bulletin W30-05-23 dated July 16, 1984, or FAA-approved equivalent.

  (b) Within 15 hours after the effective date of this AD, unless already accomplished, conduct an eddy current inspection of the main rotor blade and thereafter at intervals not to exceed every 15 hours time in service since the last inspection in accordance with Westland Service Bulletin W30-05-23, or FAA-approved equivalent.

  (c) Remove from service any main rotor blade where cracking is found and replace with a serviceable part prior to next flight.

  (d) An equivalent method of compliance with the AD may be used when approved by the Manager, Brussels Aircraft Certification Office, Federal Aviation Administration, c/o American Embassy, APO New York 09667.

This amendment becomes effective September 11, 1984, as to all persons except those person to whom it was made immediately effective by telegraphic AD T84-12-51, issued June 5, 1984, which contained this amendment.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS H12EU](https://openairdocs.org/tcds/H12EU): Westland Helicopters Limited; names 1 of 2 models: Westland 30 Series 100

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.