# AD 86-20-06: Main Rotor Drag Brace Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Bell Helicopter Textron 214B, 214B-1 and 214ST
- Effective: October 18, 1986
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-5427
- Registered aircraft: 30 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2F3189F2A4FEEB8C86256A4E004EE4E7.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/86-20-06

## The airworthiness directive

86-20-06 BELL HELICOPTER TEXTRON, INC.: Amendment 39-5427. Applies to Bell Helicopter Textron, Inc., Model 214ST helicopters, S/N's 28101 through 28159, and Models 214B and 214B-1, S/N's 28001 through 28070, certificated in any category, equipped with main rotor drag brace assembly P/N 214-010-113-001.

Compliance is required as indicated, unless already accomplished.

  (a) To prevent failure of the M/R drag brace assembly, P/N 214-010-113-001, on the Model 214ST helicopter, replace it with M/R drag' brace assembly, P/N 214-010-113-105, within the next 50 hours' time in service or within 30 days after the effective date of this AD, whichever comes first.

  (b) To prevent failure of the M/R drag brace assembly, P/N 214-010-113-001 on the Model 214B and 214B-1 helicopters, replace it with M/R drag brace assembly, P/N 214-010-113- 107, within the next 50 hours' time in service or within 30 days after the effective date of this AD, whichever comes first.

  (c) An alternate method of compliance which provides an equivalent level of safety with this AD may be used when approved by the Manager, Helicopter Certification Branch, Federal Aviation Administration, 4400 Blue Mound Road, Fort Worth, Texas 76106.

This amendment becomes effective October 18, 1986.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS H6SW](https://openairdocs.org/tcds/H6SW): McDermott 214 Holdings, LLC; names 2 of 2 models: 214B, 214B-1
- [TCDS H10SW](https://openairdocs.org/tcds/H10SW): McDermott 214 Holdings, LLC; names 1 of 1 models: 214ST

## 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: 30 (30 by airframe model, 0 by engine model)
- Makers: Bell 29, Bell Helicopter Textron 1

Models with the most aircraft:

- [Bell 214ST](https://openairdocs.org/model/bell-214st): 18 aircraft (airframe model)
- [Bell 214B-1](https://openairdocs.org/model/bell-214b-1): 9 aircraft (airframe model)
- [Bell 214B](https://openairdocs.org/model/bell-214b): 2 aircraft (airframe model)
- [Bell Helicopter Textron 214ST](https://openairdocs.org/model/bell-helicopter-textron-214st): 1 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/86-20-06/models.md
Every aircraft: https://openairdocs.org/ad/86-20-06/aircraft.md

Its text cites no advisory circulars or STCs.

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