# AD 80-25-07 R1: Oil Coolers - Type: Airworthiness directive - Status: Current - Products: American Champion 7ECA, 7GCAA, 7GCBC, 7KCAB, 8GCBC, 8KCAB, 152, 172I, 172K, 172L, 172M, 172N and 30 more - Effective: September 24, 1981 - Published: September 24, 1981 - Issued: August 25, 1981 - Superseded by: Nothing supersedes this AD - Product type: Appliance - Amendment: 39-4220 - Registered aircraft: 25,368 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C3CD2484103ACBC086256A3900683CE5.0001 - DRS record last changed: November 21, 2025 - Page: https://openairdocs.org/ad/80-25-07-R1 ## The airworthiness directive 80-25-07 R1 STEWART-WARNER CORPORATION: Amendment 39-4028 as amended by Amendment 39-4220. Applies to the following Stewart-Warner oil cooler models: STEWART WARNER MODEL NOS. BEGINNING SERIAL NOS. ENDING SERIAL NOS. 8406J 12558 16212 8406L 1496 1763 8432K 514 541 8432L 631 964 10568C 1105 1141 10578B 2212 2316 10599A 7369 9013 10610A 1815 1956 10614A 732 947 10622A 333 394 10634D 105 907 8446C 372 629 8437C 422 472 10641B 101 162 8493B 1269 1603 NOTE: The affected oil coolers were manufactured between July 1, 1979, and November 1, 1980. Oil coolers of the above model and serial numbers that have a date ink stamped next to the nameplate have been inspected by Stewart-Warner and found satisfactory for continued use. These oil coolers may be installed on, but not limited to, the following aircraft: Bellanca Models: 7ECA, 7GCAA, 7GCBC, 7KCAB, 8GCBC, and 8KCAB. Cessna Models (including Reims Aviation): 152, A152, F152, FA152, 172I, 172K, 172L, 172M, 172N, 172P, 172RG, F172L, F172M, F172P, 177, 177A, 177B, 177RG, F177RG, R182, FR182, TR182, T182, A188B, T188C, 210N, T210N, and P210N. Piper Model: PA-38-112. Mooney Models: M20C, M20E, M20F, M20G, and M20J. Great Lakes Models: 2T-1A-1 and 2T-1A-2. Beech Models: 269 Series. Compliance is required prior to further flight after the effective date of this AD, unless already accomplished. To prevent the loss of engine oil, accomplish the following: 1. If the oil cooler has accumulated 10 hours or less total time in service since new, prior to further flight, replace with an airworthy oil cooler not of the above serial numbers or with an airworthy oil cooler of the above serial numbers that have a date ink stamped next to the oil cooler name plate. NOTE: Removed oil coolers may be returned to: Stewart-Warner Corp., Attn: Mr. Ben Gillen, 1514 Drover Street, Indianapolis, Indiana 46221. 2. If the oil cooler has accumulated more than 10 hours time in service since new, visually inspect the cooler for oil leakage prior to further flight. NOTE: Removal of the engine cowling is not required if it can be positively determined from inspection of areas adjacent to the oil cooler that the oil cooler is not leaking. A. If oil leakage is evident, prior to further flight, replace with an airworthy oil cooler not of the above serial numbers or with an airworthy oil cooler of the above serial numbers that have a date ink stamped next to the oil cooler name plate. B. If oil leakage is not detected: i. Fabricate and install the following placard on the aircraft instrument panel in plain view of the crew, using letters 1/8-inch high minimum: "Visually check oil cooler for leakage prior to each flight. If leakage is detected, refer to AD Number 80-25-07." NOTE: The owner or operator may make and install this placard and conduct the preflight check.This check does not require a logbook entry. The inspection procedures identified in the note following paragraph 2 also apply to this preflight check. ii. If the oil cooler is replaced with an airworthy oil cooler not of the above serial numbers or with an airworthy oil cooler of the above serial numbers that have a date ink stamped next to the oil cooler name plate, the placard can be removed. 3. Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, 2300 East Devon Avenue, Des Plaines, Illinois 60018, telephone (312) 694-7357. Amendment 39-4028 became effective January 29, 1981, as to all persons except those to whom it was made immediately effective by the priority mail letter dated December 5, 1980, which contained this amendment. This amendment 39-4220 becomes effective September 24, 1981. ## Affected data sheets (17) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 3A12](https://openairdocs.org/tcds/3A12): Textron Aviation Inc.; names 6 of 18 models: 172M, 172K, 172L, 172P, 172N, 172I - [TCDS 2A3](https://openairdocs.org/tcds/2A3): Mooney International Corporation; names 5 of 17 models: M20F, M20E, M20C, M20J, M20G - [TCDS A-759](https://openairdocs.org/tcds/A-759): American Champion Aircraft Corp.; names 4 of 22 models: 7KCAB, 7GCAA, 7GCBC, 7ECA - [TCDS 3A13](https://openairdocs.org/tcds/3A13): Textron Aviation Inc.; names 3 of 23 models: TR182, T182, R182 - [TCDS 3A21](https://openairdocs.org/tcds/3A21): Textron Aviation Inc.; names 3 of 28 models: P210N, T210N, 210N - [TCDS A13CE](https://openairdocs.org/tcds/A13CE): Textron Aviation Inc.; names 3 of 3 models: 177, 177A, 177B - [TCDS A4EU](https://openairdocs.org/tcds/A4EU): Textron Aviation Inc.; names 3 of 11 models: F172M, F172L, F172P - [TCDS 3A19](https://openairdocs.org/tcds/3A19): Textron Aviation Inc.; names 2 of 18 models: A152, 152 - [TCDS A13EU](https://openairdocs.org/tcds/A13EU): Textron Aviation Inc.; names 2 of 14 models: FA152, F152 - [TCDS A18EA](https://openairdocs.org/tcds/A18EA): WACO Classic Aircraft Corporation; names 2 of 3 models: 2T-1A-1, 2T-1A-2 - [TCDS A21CE](https://openairdocs.org/tcds/A21CE): American Champion Aircraft Corp.; names 2 of 2 models: 8GCBC, 8KCAB - [TCDS A9CE](https://openairdocs.org/tcds/A9CE): Textron Aviation Inc.; names 2 of 7 models: A188B, T188C - [TCDS 3A17](https://openairdocs.org/tcds/3A17): Textron Aviation Inc.; names 1 of 12 models: 172RG - [TCDS A18SO](https://openairdocs.org/tcds/A18SO): Piper Aircraft Inc.; names 1 of 1 models: PA-38-112 - [TCDS A20CE](https://openairdocs.org/tcds/A20CE): Textron Aviation Inc.; names 1 of 1 models: 177RG - [TCDS A26EU](https://openairdocs.org/tcds/A26EU): Textron Aviation Inc.; names 1 of 1 models: F177RG - [TCDS A42EU](https://openairdocs.org/tcds/A42EU): Textron Aviation Inc.; names 1 of 3 models: FR182 ## 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: 25,368 (25,368 by airframe model, 0 by engine model) - Makers: Cessna 16,803, Mooney 4,332, Bellanca 1,735, American Champion 1,053, Champion 834, Piper 442, Great Lakes 121, Aerostar Acft Corp Of Texas 23, Waco Classic 20, Reims Aviation S A 2 Models with the most aircraft: - [Cessna 172M](https://openairdocs.org/model/cessna-172m): 3,574 aircraft (airframe model) - [Cessna 172N](https://openairdocs.org/model/cessna-172n): 3,138 aircraft (airframe model) - [Cessna 152](https://openairdocs.org/model/cessna-152): 1,637 aircraft (airframe model) - [Mooney M20J](https://openairdocs.org/model/mooney-m20j): 1,408 aircraft (airframe model) - [Mooney M20C](https://openairdocs.org/model/mooney-m20c): 1,258 aircraft (airframe model) - [Cessna 172P](https://openairdocs.org/model/cessna-172p): 1,111 aircraft (airframe model) - [Cessna 172K](https://openairdocs.org/model/cessna-172k): 1,026 aircraft (airframe model) - [Cessna 172L](https://openairdocs.org/model/cessna-172l): 858 aircraft (airframe model) - [Cessna 177B](https://openairdocs.org/model/cessna-177b): 843 aircraft (airframe model) - [Mooney M20E](https://openairdocs.org/model/mooney-m20e): 829 aircraft (airframe model) - [Cessna 177RG](https://openairdocs.org/model/cessna-177rg): 788 aircraft (airframe model) - [Mooney M20F](https://openairdocs.org/model/mooney-m20f): 721 aircraft (airframe model) - [Cessna R182](https://openairdocs.org/model/cessna-r182): 706 aircraft (airframe model) - [Bellanca 7GCBC](https://openairdocs.org/model/bellanca-7gcbc): 487 aircraft (airframe model) - [Cessna T210N](https://openairdocs.org/model/cessna-t210n): 467 aircraft (airframe model) - [Cessna TR182](https://openairdocs.org/model/cessna-tr182): 465 aircraft (airframe model) - [American Champion 8KCAB](https://openairdocs.org/model/american-champion-8kcab): 447 aircraft (airframe model) - [Cessna 177](https://openairdocs.org/model/cessna-177): 446 aircraft (airframe model) - [Cessna 172RG](https://openairdocs.org/model/cessna-172rg): 445 aircraft (airframe model) - [Piper PA-38-112](https://openairdocs.org/model/piper-pa-38-112): 442 aircraft (airframe model) All 60 models: https://openairdocs.org/ad/80-25-07-R1/models.md Every aircraft: https://openairdocs.org/ad/80-25-07-R1/aircraft.md Its text cites no advisory circulars or STCs. --- From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.