Description
Cirrus Aircraft 15163-025 Nut — Backing
Backing nut listed in the Basic ice protection installation (IPC 30-05-01) and in the FIKI ice protection installation (IPC 30-07-01), quantity 1 in the FIKI installation.
Fit, per the Cirrus Illustrated Parts Catalog:
- Basic ice protection (IPC 30-05-01): SR22 serials 0448 through 2437
- FIKI ice protection (IPC 30-07-01): SR22 serials 3403 and up, SR22T serials 0001 and up
TKS filters: Cirrus's maintenance manual (05-10) schedules replacement of the ice protection system filter every 1,200 hours or 2 years, whichever comes first. Filter elements: 26115-101 (Basic and Basic² systems; FIKI SR22 3403–3850 and SR22T 0001–0315) and 21986-203 (FIKI SR22 3851 and up, SR22T 0316 and up).
Serial ranges are transcribed from the Cirrus IPC. Confirm your aircraft's serial number, installed equipment and service bulletin compliance against current Cirrus documents before ordering.
Reference only — not a maintenance authority. The part numbers, effectivity and service bulletin references shown above are published as an aid to our customers and may not reflect current Cirrus data. They must not be used as the basis for installation. Mechanics must obtain and use their own current Cirrus Illustrated Parts Catalog and the current revision of any service bulletin, and must verify applicability against the aircraft serial number, service bulletin compliance and any installed STCs, before ordering or installing any part.




