# AD 73-14-04: Engine and Prop Controls

- Type: Airworthiness directive
- Status: Current
- Products: Commander 112
- Effective: July 3, 1973
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1678
- Registered aircraft: 107 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D295C261D59331EA86256A38005D9D3C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/73-14-04

## The airworthiness directive

73-14-04 ROCKWELL INTERNATIONAL: Amdt. 39-1678. Applies to Rockwell Commander Model 112 airplanes, Serial Numbers 3 through 90 certificated in all categories. Compliance is required prior to next flight. Accomplish the following:

  (1) Remove engine control knobs (throttle, mixture, propeller, carburetor heat) (2) Remove cover from throttle quadrant (Royalite) (3) Remove knob from throttle friction lock (4) Remove microphone bracket (5) Remove knob from fuel selector (6) Remove forward arm rest (not applicable on all models) (7) Remove center console fuel selector insert (Royalite) (8) Remove center console cover (Royalite) (9) Remove throttle quadrant cover (aluminum) (10) Move controls to full aft position to expose cables

  (11) Using a sharp instrument remove the grommets which seal ends of the sliding control rod to the flex cable housing, if installed. Controls which may have these grommets are: throttle, mixture, propeller and carburetor heat

  (12) Remove upper engine cowl, and remove grommets from opposite ends of cables. (Do not remove grommets from ends of cowl flap controls)

  (13) A. Functionally check all controls for freedom of operation.

B. Ascertain that no shavings from the grommets are lodged between the cable housing and movable cable.

  (14) Reassemble using existing hardware

Rockwell International, Albany Aircraft Division, Service Bulletin, No. SB-112-5 relates to this same subject.

This amendment is effective July 3, 1973, and was effective on receipt for all recipients of the telegram dated June 11, 1973, which contained this amendment.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A12SO](https://openairdocs.org/tcds/A12SO): Commander Aircraft Corporation; names 1 of 8 models: 112

## 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: 107 (107 by airframe model, 0 by engine model)
- Makers: Aero Commander 98, Rockwell International 9

Models with the most aircraft:

- [Aero Commander 112](https://openairdocs.org/model/aero-commander-112): 98 aircraft (airframe model)
- [Rockwell International 112](https://openairdocs.org/model/rockwell-international-112): 9 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/73-14-04/models.md
Every aircraft: https://openairdocs.org/ad/73-14-04/aircraft.md

Its text cites no advisory circulars or STCs.

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