# AD 73-01-01: Exhaust Outlet Blockage

- Type: Airworthiness directive
- Status: Current
- Products: Dynac Aerospace Aero Commander 100 and Aero Commander 100-180
- Effective: December 29, 1972
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1578
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/36FA27FC2ACD796786256A38004CDB9C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/73-01-01

## The airworthiness directive

73-01-01 NORTH AMERICAN ROCKWELL - AERO COMMANDER: Amdt. 39-1578. Applies to Model 100-180 Serial Numbers 068, 5001 through 5213 certificated in all categories. Model 100 Serial Numbers 251 through 360 and those Model 100's retrofitted with Elano Corporation exhaust system (NEE Turbo System Inc.) P/N 099001, certificated in all categories.

Compliance required as follows:

For exhaust systems which have accumulated 500 or more hours time in service accomplish the following prior to the next 25 hours time in service unless already accomplished.

To prevent loss or reduction of engine power due to exhaust outlet blockage accomplish the following:

  (1) Inspect and repair or replace the exhaust system components in accordance with FAA Advisory Circular AC No. 43.13-1 Chapter 14, Section 3.

  (2) Install Aero Commander exhaust outlet guard Part Number SK1093, or equivalent approved by Chief, Engineering and Manufacturing Branch, Southern Region, as follows:

  (a) Remove muffler heater shroud.

  (b) Drill 5/16 inch diameter hole through one wall of the exhaust tailpipe. Hole to be drilled on side of tail pipe closest to centerline of the airplane. Hole to be located 3 3/8 inches down from muffler outer wall.

  (c) Install outlet guard Part Number SK1093 in hole and position so that guard does not touch any part of the inner muffler parts.

  (d) Tighten guard around tailpipe and reassemble exhaust system.

Aero Commander Service Bulletin SB 1019 covers this same subject.

This amendment becomes effective December 29, 1972.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1A21](https://openairdocs.org/tcds/1A21): Dynac Aerospace Corporation; names 2 of 5 models: Aero Commander 100, Aero Commander 100-180

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

## Related documents

- [AC 43.13-1B CHG 1 Ed Update](https://openairdocs.org/ac/43.13-1): Acceptable Methods, Techniques, and Practices—Aircraft Inspection and Repair. Cited as AC 43.13-1 in the AD's requirements

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