Starter Certification 101

Engine Manufacturer	Sky-Tec Starter Model Family	Certification	ID	Authority for Installation
Lycoming	NL Series	PMA PQ0852SW Supplement 7	Label	PMA PQ0852SW Supplement 7 AML
Lycoming	HT, LS or PM Series	PMA PQ0852SW Supplement 1	Label	PMA PQ0852SW Supplement 1
Continental	ST3 Series	PMA PQ0852SW Supplement 8	Label	PMA PQ0852SW Supplement 8
Continental	ST5 Series	PMA PQ0852SW Supplement 6	Label	PMA PQ0852SW Supplement 6
Continental	ST2 Series	PMA PQ0852SW Supplement 5	Label	On factory key-start engines (C85, C90, O-200, C145, O-300), authority is by PMA PQ0852SW Supplement 5 AML
	C12ST2/S			On factory IO-240-series engines, authority is by PMA PQ0852SW Supplement 5 On factory pull-start engines (C85-12 thru O-300-C), authority is by modification per STC SE10076SC (engine modification) and STC SA10077SC (airframe modification to replace pull-start mechanism with push to start button). Be aware there is a typo on page 3 of 3 of STC SE10076SC. The FAA typed the wrong STC number at the top of the page. It should read STC SE10076SC, not SA1007SC. We have asked the FAA repeatedly for correction for over three years!!! We continue to do so. Support Docs for the STC(s) listed above can be found here. This includes a letter of authorization to use the STC's.
	C12ST2/SR			On factory pull-start engines (C85-12 thru O-300-C), authority is by modification per STC SE10076SC (engine modification) and STC SA10077SC (airframe modification to replace pull-start mechanism with push to start button)

Notes of explanation on Lycoming Applications:

Sky-Tec LS, PM and HT starters are certified by PMA (parts Manufacturer Approval) Supplement 1 and are eligible for installation on all Lycoming Engines listed in the AML of PMA Supplement 1.

Lycoming Service Instruction 1154(current revision) is additional documentation allowing Sky-Tec LS, PM, and HT Lycoming starters to be installed a replacement for identical or any previously certified Lycoming starter. Whereas the LS, PM and HT starters are certified under PMA (parts Manufacturer Approval) Supplement 1, NL model starters are certified via PMA PQ0852SW Supplement 7.

Since certification of all Sky-Tec Lycoming starters is by PMA, the only paperwork required is an engine logbook entry by the installing A&P and a W&B change in the AFM.

This should cover 99% of Lycoming engines (give or take).

Notes of explanation on Continental Applications:

Sky-Tec starter C12ST2 is certified by PMA PQ0852SW Supplement 5 as a replacement part for OEM Continental O-200 "key start" starters and is eligible on the via PMA PQ0852SW Supplement 5 on all engines listed on the AML of Supplement 5. Therefore, no 337's are required for these applications. Like the Lycoming starters, the only paperwork required is an engine logbook entry by the installing A&P and a W&B change in the AFM.

Sky-Tec starter C12ST2/S is eligible via PMA PQ0852SW Supplement 5 on all engines listed on the AML of Supplement 5. No 337's are required for the applications listed on the AML of Supplement 5. Like the Lycoming starters, the only paperwork required is an engine logbook entry by the installing A&P and a W&B change in the AFM.

Starter C12ST2/S is also certified for use as a replacement for OEM Continental pull-type starters on Continental Engines C85-12 through O300-C and is eligible for installation via Supplemental Type Certificate (STC) by means of modifying the engine per STC SE10076SC (see Converting a Pull-Start). Additionally, the installation of a push-button switch to operate the starter is authorized in STC SA10077SC which details replacement of a factory pull-start mechanism with the Sky-Tec supplied push button switch and wiring (supplied with starter in KCST2 or separately as KCSW). Important note: Replacing the original pull-start mechanism with a key-start is NOT certified under this STC, nor is doing so recommended by Sky-Tec. Doing so on a certified aircraft will require the aircraft owner to seek a Field Approval by an appropriately certified FAA representative.

Ancient History for Lycoming Applications:

Sky-Tec LS, PM and HT starters were originally certified with eligibility via STC (see Lycoming Starter STC's below). If on the slim chance your starter installation was approved under STC eligibility, your installation required an FAA form 337 to be filed by an IA. The STC's (no longer used but still valid) are:

If you have starter Then refer to STC*

149-12PM or 122-12PM
149-12LS or 122-12LS SE00218NY

149-24PM or 122-24PM
149-24LS or 122-24LS SE00357NY

149-12HT or 122-12HT SE1081NE

149-24HT or 122-24HT SE00226NY

*Remember, STCs are ONLY required if your Lycoming engine never had a starter on it previously. Otherwise, refer to Lycoming Service Instruction #1154 (see links above). As such, these STC's are only available by contacting Sky-Tec during regular business hours (8a-5p CST).

Although PMA certification by test & computation supersedes the need for the use of the STC as authority for installation, an installation by STC is still valid.

Notes of explanation on Franklin Applications:

Sky-Tec starters F12ST1 and F24ST1 are certified by PMA PQ0852SW Supplement 4 as replacement parts for all previously certified starters on Franklin engines 4A-235 thru 6V-350. Like the Lycoming installations, the "FAA-PMA" nameplate on the starter, logbook entry by certified A&P and a W&B change in the AFM are all that are needed to certify the installation of Sky-Tec's Franklin starters (copies of the PMA are for your information only and are never required for certification).

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