Airworthiness Directive · Amendment 39-15160 · Allied Ag Cat Productions, Inc. (Type Certificate No. 1A16 Formerly Held by Schweizer Aircraft Corp.) G-164 Series Airplanes
Allied Ag Cat Productions, Inc. (Type Certificate No. 1A16 Formerly Held by Schweizer Aircraft Corp.) G-164 Series Airplanes
This AD applies to the following model and serial number airplanes that are certificated in any category and have Gemini fuel shut-off valve part number (P/N) 3/4-86-6-RT-6 (A3580-1) installed:
(1) Group 1 (maintains the actions from AD 82-07-04):
| Model | Serial Nos. |
|---|---|
| (i) G-164A | 1726A through 1730A. |
| (ii) G-164B | 335B through 659B. |
| (iii) G-164C | 1C through 44C. |
| (iv) G-164D | 1D through 22D. |
(2) Group 2:
| Model | Serial Nos. |
|---|---|
| (i) G-164 | All. |
| (ii) G-164A | All except 1726A through 1730A. |
| (iii) G-164B and G-164B with 73″ wing gap | All except 335B through 659B. |
| (iv) G-164B-15T | All. |
| (v) G-164B-20T | All. |
| (vi) G-164B-34T | All. |
| (vii) G-164C | All except 1C through 44C. |
| (iv) G-164D and G-164D with 73″ wing gap | All except 1D through 22D. |
We are adopting a new airworthiness directive (AD) to supersede AD 82-07-04, which applies to certain Allied Ag Cat Productions, Inc. (Ag Cat) G-164 series airplanes. AD 82-07-04 currently requires you to modify the fuel shut-off valve control by installing a new stop-plate. Since we issued AD 82-07-04, we have determined the need to add airplane models and serial numbers that were not previously included in the Applicability section. Consequently, this AD retains the actions of AD 82-07-04 and adds airplane models and serial numbers to the Applicability section. We are issuing this AD to prevent turning the fuel shut-off valve clockwise past the "ON" position stop which, if not corrected, could allow the fuel valve to be rotated to an unplacarded "OFF" position. This condition could lead to reduced fuel flow and consequent loss of engine power.
To address this problem, you must do the following, unless already done:
| Actions | Compliance | Procedures |
|---|---|---|
| (1) Modify the fuel shut-off valve control by installation of a new stop-plate, P/N A1552-71 (or FAA-approved equivalent) | (i) For Group 1 Airplanes: Within the next 100 hours time-in-service (TIS) after April 6, 1982 (the effective date of AD 82-07-04) | Follow Schweizer Aircraft Corp. Ag-Cat Service Bulletin No. 78, dated January 26, 1982. |
| (ii) For Group 2 Airplanes: Within the next 100 hours TIS after September 18, 2007 (the effective date of this AD). | ||
| (2) Do not install any Gemini fuel shut-off valve P/N 3/4-86-6-RT-6 (A3580-1) on any airplane unless the stop-plate is installed per paragraph (e)(1) of this AD | For all Airplanes: As of the next 100 hours TIS after September 18, 2007 (the effective date of this AD) | Follow Schweizer Aircraft Corp. Ag-Cat Service Bulletin No. 78, dated January 26, 1982. |
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
