Page 39 - Volume 13 Number 4

Technically...
From Multi-Engine Turboprop Communiqué ME-TP-0012
Date: March 2019
ATA 00 - Form 337 for Equipment
or STCs Installed at the Factory
Technical Support receives requests for a Form 337 for equipment or STCs installed on King Airs at the factory. We have consulted with the Quality Department and they have provided the following explanation of why Form 337s are not issued.
Their explanation follows:
The FAA Guidance for issuing a FAA Form 337 exist under 14 CFR Part 43 Appendix B (14 CFR Section B43.1). However, the new aircraft manufactured under a Production Certificate is manufactured under Part 21. The newly manufactured aircraft do not enter into the (Part 43) Maintenance world or rules until it is issued a Standard C of A (FAA Form 8100-2).
FAA Order 8120.22 Rev A states the following in the applicability section:
3-1. Applicability.
a. Part 21, subpart G, applies to any of the following persons who desire to manufacture a complete product and article(s) with benefit of a PC:
1. The holder/licensee of a § 21.21 TC.
2. The U.S. holder/licensee of a § 21.29 TC, if the li- censing agreement clearly provides for the TC hold- er’s and its Civil Aviation Authority’s (CAA) control
over any design changes by the licensee. A working arrangement, associated with the respective bilateral agreement, must also be in place between the CAA and the FAA defining their re- spective responsibilities as State of Design and State of Manufacture.
3. The holder of a supplemental type certificate (STC) when:
a. The STC will be incor- porated prior to the is- suance of an original airworthiness certificate (OAC) to the aircraft; or
b. The STC will be incorporated after the issuance of an OAC to the aircraft. In this case, the PC would authorize the manufacturing of as- sociated STC articles in accordance with Part 21. However, in- stallation of the STC and return to service of the product is ac- complished under the provisions of 14 CFR part 43.
The further defines that there are three ways to incorporate an STC prior to issuance of OAC [two by means of Engineering (by merger/amending into the TC data or incorporation by reference in the TC Data) and one by incorporation under the PC which must be on our
Production Limitation Record]. These are as follows and are all under Part 21 rules and not under Part 43 rules.
5. STC Modifications Incorporated by a TC/PC Holder.
a. When the holder of the TC seeks and obtains its own STC, or is licensed to use another person’s STC data, the TC holder may amend the TC to incorporate the STC approval by reference.
APRIL 2019
TSO High Altitude FAA Approved Mask
with comfort fit headgear
King Air Replacement Mask Carbon Fiber
Phone (800) 237-6902 www.aerox.com
KING AIR MAGAZINE • 37