# AD 71-08-06: Overspeed Pickup Housing Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Honeywell International T5313A and T5313B
- Effective: April 16, 1971
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-1192
- Registered aircraft: 108 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/85E2DADA03EDAB398625682A005357E8.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/71-08-06

## The airworthiness directive

71-08-06 AVCO LYCOMING: Amdt. 39-1192. Applies to all Avco Lycoming T5313A and T5313B turboshaft engines which incorporate part number 1-180-230-01 or -03 Overspeed Pickup Housing Assembly. Compliance required as follows: (a) To detect possible failure of the overspeed pickup gear bearings, perform the following inspection within the next 25 hours' time in service after the effective date of this AD and every 25 hours' time in service thereafter until item (b) is accomplished. Inspect Part Number 1-180-230-01 or -03 Overspeed Pickup Housing Assembly in accordance with the procedure given in Part 1 of Avco Lycoming Service Bulletin, Product Support, No. 0022, Rev. 1, dated 1 March 1971. (b) To prevent secondary failure of the power turbine (N2) accessory drive system as a result of failure of the overspeed gear bearings, accomplish the following within the next 200 hours time in service after the effective date of this AD. Replace Overspeed Pickup Housing Assembly P/N 1-180-230-01 or -03 with P/N 1-180-230-04 (Note: Part II of Avco Lycoming Service Bulletin, Product Support, No. 0022 provides information for modifying Part numbers 1-180-230-01 and -03 to the -04 configuration). The manufacturer's Service Bulletin identified and described in this directive is incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Avco, Lycoming Division, Avco Corp., 550 So. Main Street, Stratford, Conn. These documents may also be examined at the FAA, Eastern Region, Federal Building, J.F. Kennedy International Airport, Jamaica, New York and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD which includes the incorporated material in full is maintained by the FAA at its headquarters in Washington, D.C. and in the Eastern Region. This amendment is effective April 16, 1971.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E17EA](https://openairdocs.org/tcds/E17EA): Ozark Aeroworks LLC; names 2 of 6 models: T5313B, T5313A

## 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: 108 (0 by airframe model, 108 by engine model)
- Makers: Bell 76, Garlick Helicopters 8, Grumman 4, Southwest Florida 3, Western International Avia 2, Williams Helicopter 2, Anderson Douglas 1, Bell Helicopter 1, Bell-Colonial 1, Bell-Sw Florida Avn 1

Models with the most aircraft:

- [Lycoming T-53 series](https://openairdocs.org/engine/lycoming-t-53-series): 95 aircraft (engine model)
- [Lycoming T5313B](https://openairdocs.org/engine/lycoming-t5313b): 8 aircraft (engine model)
- [Honeywell T5313B](https://openairdocs.org/engine/honeywell-t5313b): 5 aircraft (engine model)

All 5 models: https://openairdocs.org/ad/71-08-06/models.md
Every aircraft: https://openairdocs.org/ad/71-08-06/aircraft.md

Its text cites no advisory circulars or STCs.

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