# AD 89-24-03: Turbocharger Inlet Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Continental Motors TSIO-520-UB
- Effective: June 18, 1990
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-6386
- Docket: 89-ANE-19
- Registered aircraft: 4,140 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0F9B4360F9E1EF768625691500454F31.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/89-24-03

## The airworthiness directive

89-24-03 TELEDYNE CONTINENTAL MOTORS (TCM): Amendment 39-6386. Correction issued on May 8, 1990. Docket No. 89-ANE-19. Applicability: TCM Model TSIO-520-UB engines, serial numbers 515000 thru 515999 and 527000 thru 527070, and to all remanufactured and overhauled engines of this model, regardless of serial number, which are equipped with part number (P/N) 642668 turbocharger inlet assembly. Compliance: Required at the next 100 hour inspection or annual inspection, or within 100 flight hours, whichever occurs first after the effective date of this AD, and thereafter at intervals not to exceed 100 flight hours. To prevent possible cracking of the turbocharger inlet assembly which could result in engine compartment fire, accomplish the following: (a) Visually inspect turbocharger inlet assembly P/N 642668 for cracks especially in the weld joints just above the turbine inlet temperature boss. If a crack is found, replace P/N 642668 with P/N 646795 turbocharger inlet assembly, prior to further flight. (b) Make appropriate log book entry showing compliance with this AD. NOTES: (1) Beechcraft Aircraft Corporation Service Communique No. 70, dated October 28, 1983, refers to this subject. NOTES: (2) When determining the P/N assembly installed in order to comply with this AD, a distinguishing feature of the P/N 646795 turbocharger inlet assembly is 2 ribs (approximately 0.25 inches in height, 0.1 inches in width, and 2.1 inches in length) on the top of the turbocharger mating flange. NOTES: (3) If P/N 642668 is not installed, no action is required. (c) Aircraft may be ferried in accordance with the provisions of FAR 21.197 and 21.199 to a base where the AD can be accomplished. (d) Upon submission of substantiating data by an owner or operator through an FAA Airworthiness Inspector, an alternate method of compliance with the requirements of this AD or adjustments to the compliance schedule specified in this AD may be approved by the Manager,Atlanta Aircraft Certification Office, Federal Aviation Administration, 1669 Phoenix Parkway, Suite 210C, Atlanta, Georgia 30349. This amendment 39-6386 (AD 89-24-03) became effective on December 4, 1989. This correction becomes effective on June 18, 1990.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E8CE](https://openairdocs.org/tcds/E8CE): Continental Aerospace Technologies, Inc.; names 1 of 31 models: TSIO-520-UB

## 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: 4,140 (0 by airframe model, 4,140 by engine model)
- Makers: Cessna 3,180, Beech 690, Piper 173, Raytheon 68, Mooney 11, Meyers Industries 2, Navion 2, Ryan 2, Aero Commander 1, Cirrus Design 1

Models with the most aircraft:

- [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series): 4,064 aircraft (engine model)
- [TCM Cont TSIO-520 series](https://openairdocs.org/engine/tcm-cont-tsio-520-series): 49 aircraft (engine model)
- [Continental TSIO-520-UB](https://openairdocs.org/engine/continental-tsio-520-ub): 27 aircraft (engine model)

All 4 models: https://openairdocs.org/ad/89-24-03/models.md
Every aircraft: https://openairdocs.org/ad/89-24-03/aircraft.md

Its text cites no advisory circulars or STCs.

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