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e. Examples of flight safety critical engine and propeller parts are life-limited parts, rotating parts, and for rotorcraft, actuating parts.
12. DUAL USE MILITARY SURPLUS ENGINES, PROPELLERS, ACCESSORIES, AND THEIR PARTS. The process of eligibility screening and airworthiness evaluation of dual use military surplus engines, propellers, accessories, or their parts, by individuals authorized under § 43.7, or other airworthiness evaluation by individuals specified, is shown in Figure 4 and described in subparagraphs 12a through 12g. The authorized individual completing the eligibility screening and/or the airworthiness evaluation should make a record entry to document the result(s).
a. Eligibility of New Dual Use Engines, Propellers, Accessories, or Their Parts for Installation on Aircraft With Standard or Special Airworthiness Certification. A U.S. TC must have been issued for a corresponding civil model engine or propeller under § 21.21 at the time of manufacture (standard or special), or a U.S. aircraft TC must have been issued and the engines or propellers referenced in the aircraft TCDS under § 21.27 (standard) or § 21.25 (special). New dual use engines, propellers, accessories, or their parts, as defined in subparagraph 5c may be considered eligible for installation on FAA type-certificated surplus military aircraft or civil aircraft with standard airworthiness certification or special airworthiness certification, based upon the requisite favorable findings from reviewing pertinent historical records detailing the following applicable information:
FIGURE 4. DUAL USE ENGINES, PROPELLERS, ACCESSORIES, OR THEIR PARTS (NEW OR USED)
DUAL USE ENGINES
PROPELLERS, ACCESSORIES,
OR THEIR PARTS (NEW OR USED) ELIGIBILITY -NO→ DO NOT INSTALL 12a or 12d YES STD INSTALL 12g *YES- EVALUATION 12b or 12e STD SPEC OR SPEC- EVALUATION 12c or 12f -YES→ INSTALL 12g NO NO DO NOT
INSTALL (FOR DO NOT
STD A/W INSTALL CERT)
(1) Engine, propeller, accessories, and part identification - assembly part number and serial number and manufacturer;
(2) Contract or purchase order number manufactured under;
(3) Evidence of engine, propeller, accessory, and part status (i.e., serviceable or unserviceable, per DD Form 1574-1 or DA Form 2410);
(4) Complete historical records maintained by the military, the manufacturer, and any other prior owner(s), pertaining to inspection, modification, repair, alteration, maintenance, and operation of the engine from the time of acceptance by the military, including, but not limited to,
• DA Form 2408-5 and DA Form 2408-16. The maintenance records should also include the date that the work was accomplished, and work authentication; and Par 12 Page 13
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(5) (Current status of applicable ADs and DoD directives (i.e., engineering change, technical order, maintenance work order, etc.), including the date, method, and compliance requirement; if the AD involves recurring action, then also include the time and date when the next action is required.
b. Evaluation of New Dual Use Engines, Propellers, Accessories, or Their Parts for Aircraft With Standard Airworthiness Certification. After reviewing the applicable items listed in subparagraph 12a and establishing that the product/part is eligible for installation on an FAA type-certificated civil aircraft, the evaluation should ensure that each engine, propeller, accessory and associated part conforms to the approved TC, was manufactured under an FAA-approved production system, and is in condition for safe operation.
c. Evaluation of New Dual Use Engines, Propellers, Accessories, or Their Parts for Aircraft With Special Airworthiness Certification. After reviewing the applicable items listed in subparagraph 12a of this AC to ensure that the engine, propeller, accessory or part is eligible, the evaluation should verify that the engine, propeller, accessory, or associated part is listed in the FAA-accepted, military-approved maintenance manual or FAA-accepted civil maintenance manual and IPC specified on the TCDS, and that the product/part is in condition for safe operation.
d. Eligibility of Used Dual Use Engines, Propellers, Accessories, or Their Parts for Aircraft with Standard or Special Airworthiness Certification. A U.S. TC must have been issued for a corresponding civil model engine or propeller under § 21.21 at the time of manufacture (standard or special), or a U.S. aircraft TC must have been issued and the engine or propeller referenced in the aircraft TCDS under § 21.27 (standard) or § 21.25 (special). The used engines, propellers, accessories, or parts may be considered eligible for installation on FAA type-certificated civil or surplus military aircraft with standard or special airworthiness certification when accompanied by pertinent historical records in accordance with the items listed in subparagraph 12a.
e. Evaluation of Used Dual Use Engines, Propellers, Accessories, or Their Parts for Aircraft with Standard Airworthiness Certification. After establishing eligibility by reviewing the applicable items listed in subparagraph 12a, the evaluation should be performed by an FAA Engineer or an appropriately authorized designated engineering representative (DER).
When a DER is used, ensure that the DER substantiates recommendations or decisions in writing using FAA Form 8110-3, Statement of Compliance with Airworthiness Standards, including supporting document(s). The evaluation should ensure that each engine, propeller, accessory, and associated part conforms to the approved TC, was manufactured under an FAA-approved production system, and is in condition for safe operation. In addition, the following should be evaluated:
(1) Operational differences between military and civil versions (e.g., possible DoD modification, alteration, repair, etc. performed), in performance standards as listed in the TCDS
(e.g., thrust, shaft horsepower, RPM, and ratings), and in specifications, as listed in the TCDS and the maintenance manuals (e.g., fuel type, oil, weight);
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(2) Complete historical operational records, i.e., extreme operational conditions such as accidents, fires or engine operating limit exceedances;
(3) Complete historical maintenance records, i.e., modifications, alterations, and repairs, and complete documentation of work performed by an FAA-approved facility that was properly rated for the work performed and which conformed to the FAA-approved data;
(4) ICA;
(5) Emission requirements as stated in the TCDS (engine only);
(6) Comparison of military time and/or cycle count for accumulated operational time and cycle versus civil (e.g., “Did the military use a different method than civil operators to account for accumulated operational time and what are the expended equivalent civil cycles of the parts, taking into account their past operational history and mission profile?”);
(7) Current manufacturer’s technical data to perform tests or inspections;
(8) Written results of inspections performed (e.g., maintenance record entry, FAA Form 8130-3 or FAA Form 337, Major Repair and Alteration (Airframe, Powerplant, Propeller, or Appliance), for approval for return to service) and a completed FAA Form 8130-9, Statement of Conformity, signed by the person who approved the item for return to service, as applicable;
(9) The application of the identifying marking requirements per 14 CFR part 45, §§ 45.11 and 45.13, as applicable;
(10) Engine, propeller, accessory, or part overhaul records, including overhaul in accordance with civil engine/propeller manuals (e.g., “Is the engine, propeller, accessory or part in a newly overhauled condition?”); and
(11) Verification that engine, propeller, accessory, or part was produced by an FAA PAH.
f. Evaluation of Used Dual Use Engines, Propellers, Accessories, or Their Parts for Aircraft with Special Airworthiness Certification. After eligibility is established, the evaluation should be performed by an FAA Engineer or an appropriately authorized DER. When a DER is used, ensure that the DER substantiates recommendations or decisions in writing using FAA Form 8110-3, including supporting document(s). The evaluation should verify that the engine, propeller, accessory, or associated part is listed in the FAA-accepted, military-approved maintenance manual or FAA-accepted maintenance manual and IPC specified on the TCDS, and that the product/part is in condition for safe operation. In addition, the following should be evaluated:
(1) Complete historical operational records, i.e., extreme operational conditions such as accidents, fires, or engine operating limit exceedances;
(2) Complete historical maintenance records, i.e., modifications, alterations, and repairs, and complete documentation of the work performed;
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(3) ICA;
(4) Emission requirements as stated in the TCDS (engine only);
(5) Comparison of military time and/or cycle count for accumulated operational time and cycle versus civil (e.g., “Did the military use a different method than civil operators to account for accumulated operational time and what are the expended equivalent civil cycles of the parts, taking into account their past operational history and mission profile?”);
(6) Current manufacturer’s technical data to perform tests or inspections;
(7) Written results of inspections performed (e.g., maintenance record entry, FAA Form 8130-3 or FAA Form 337 for “Return-to-Service”) and a completed FAA Form 8130-9, signed by the person who approved the “Return-to-Service”, as applicable;
(8) The application of the identifying marking requirements per §§ 45.11 and 45.13, as applicable;
(9) Engine, propeller, accessory, or part overhaul records, including overhaul in accordance with civil engine/propeller manuals (e.g., “Is the engine, propeller, accessory or part in a newly overhauled condition?”); and
(10) Verification that engine, propeller, accessory, or part was produced by an FAA PAH.
g. Approval for Installation of Dual Use Engines, Propellers, Accessories, and Parts.
Persons authorized under § 43.7 may approve for installation dual use engines, propellers, accessories, or parts that have successfully completed airworthiness evaluation in accordance with subparagraph 12b, 12c, 12e, or 12f. The installer must be able to determine that the use of the engine or propeller, and/or the installation of the accessory or part, will leave the aircraft in compliance with pertinent regulations and in condition for safe operation.
13. MILITARY UNIQUE ENGINES, PROPELLERS, ACCESSORIES, AND THEIR MILITARY UNIQUE PARTS. Military unique engines, propellers, accessories, and parts are FSCAP that were specifically and uniquely designed and manufactured for the U.S. military for which there was originally no corresponding FAA-approved PAH engine, propeller, accessory or part for civil application. The process of eligibility screening and airworthiness evaluation of military unique engines and propellers by individuals authorized under § 43.7, or other airworthiness evaluation by individuals specified, is shown in Figure 5 and described in subparagraphs 13a through d. The authorized individual completing the eligibility screening and/or the airworthiness evaluation should make a record entry to document the result(s).
a. Eligibility. Military unique engines, propellers, accessories, and parts may be eligible for installation on surplus U.S. military aircraft with special airworthiness type certification under §§ 21.25(a) and 21.8. The accompanying historical records for military unique engines, propellers, accessories, or parts should contain the pertinent information in accordance with the items listed in subparagraph 12a.
FIGURE 5. MILITARY UNIQUE ENGINES, PROPELLERS, ACCESSORIES, OR THEIR
MILITARY UNIQUE PARTS (SPECIAL USE ONLY)
MILITARY UNIQUE ENGINES, PROPELLERS,
ACCESSORIES, OR THEIR MILITARY UNIQUE
PARTS (SPECIAL USE ONLY) ELIGIBILITY • NO → DO NOT INSTALL 13a YES NEW INSTALL -YES EVALUATION -NEW- OR USED EVALUATION -YES→ INSTALL 13d 13b USED 13c 13d NO NO DO NOT
INSTALL
b. Evaluation of New Military Unique Engines, Propellers, Accessories, and Their Parts for Installation on Surplus Military Aircraft With Special Airworthiness
• Certification. After reviewing applicable records listed in subparagraph 12a of this AC to ensure that the engine, propeller, accessory, or part is eligible, the evaluation should verify that the engine, propeller, accessory, or associated part is listed in the FAA-accepted, military-approved maintenance manual or FAA-accepted civil maintenance manual and IPC specified on the TCDS, and ensure that the engine, propeller, accessory, or part is in condition for safe operation.
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c. Evaluation of Used Military Unique Engines, Propellers, Accessories, and Their Parts for Installation on Surplus Military Aircraft With Special Airworthiness Certification. After the applicable records listed in subparagraph 12a are reviewed to ensure that the engine, propeller, accessory, or part is eligible, the evaluation should be performed by an FAA engineer or an appropriately authorized DER. When a DER is used, ensure that the DER substantiates recommendations or decisions in writing using FAA Form 8110-3, including supporting document(s). The evaluation should verify that the engine, propeller, accessory, or associated part is listed in the FAA-accepted, military-approved maintenance manual or FAA-accepted civil maintenance manual and the IPC specified on the TCDS, and ensure that the product/part is in condition for safe operation.
d. Approval for Installation of Military Unique Engines, Propellers, Accessories, and Parts. Persons authorized under § 43.7 may approve for installation military unique engines, propellers, accessories, or parts that have successfully completed airworthiness evaluation in accordance with subparagraph 13b or 13c. The installer must be able to determine that the use of the engine or propeller, and/or the installation of the accessory or part, will leave the product in compliance with the TCDS and in condition for safe operation.
14. SUMMARY. To ensure continued safety in civil aviation, it is essential that appropriate data is used when determining the eligibility for installation on an FAA type-certificated aircraft of all U.S. military surplus FSCAP, engines, and propellers. The airworthiness evaluation should be performed by an authorized person reviewing the applicable records and performing appropriate tests and inspections as specified, and shall ensure that each FSCAP, engine or propeller conforms to its approved type design and is in condition for safe operation.
15. AC FEEDBACK FORM. For your convenience, the AC Feedback Form is the last page of this AC. Note any deficiencies found, clarifications needed, or suggested improvements regarding the contents of this AC on the Feedback Form.
Advisory Circular Feedback Form If you find an error in this AC, have recommendations for improving it, or have suggestions for new items/subjects to be added, you may let us know by contacting the Flight Standards Directives Management Officer at 9-AWA-AFB-120-Directives@faa.gov.
Subject: AC 20-142 CHG 1, Eligibility and Evaluation of U.S. Military Surplus Flight Safety Critical Aircraft Parts, Engines, and Propellers Date: _____________________ Please check all appropriate line items:
An erro r (pro ce dural or typographical) has been noted in paragraph ____________ on page _______.
Recommend paragraph _____________ on page __________ be changed as follows:
______________________________________________________________________ ______________________________________________________________________ In a future change to this AC, please cover the following subject:
(Briefly describe what you want added.)
______________________________________________________________________ ______________________________________________________________________ Other comments:
______________________________________________________________________ ______________________________________________________________________ I would like to discuss the above. Please contact me.
Submitted by: Date: ______________________