SERVICE DIRECTIVE BULLETIN 0053
ENSTROM F28F · Service Bulletins
Overview
This document is a service directive bulletin for the Enstrom F28F helicopter, detailing compliance with Avco Lycoming Service Bulletin No. 454 regarding the replacement of oil pump impellers. It outlines the necessary procedures for performing this maintenance task on specific helicopter models.
- Applicable to F28C, 280C, F28F, and 280F models.
- Focuses on compliance with Avco Lycoming Service Bulletin No. 454.
- Includes detailed procedures for accessory case removal.
- Cautions against bending the tach drive shaft during maintenance.
- Reinstallation should be done in reverse order of removal.
- Refer to the aircraft Maintenance Manual for torque and timing specifications.
Document
Source
Originally published by enstromhelicopter.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 1981
- File size ·
- 621 KB
- Publisher ·
- enstromhelicopter.com
- Language ·
- en
What is the SERVICE DIRECTIVE BULLETIN 0053?
The SERVICE DIRECTIVE BULLETIN 0053 is a service bulletins for the ENSTROM F28F, dated 1981.
Where does the SERVICE DIRECTIVE BULLETIN 0053 come from?
This copy of the SERVICE DIRECTIVE BULLETIN 0053 was originally published by enstromhelicopter.com and is hosted on Sprinkle as a free, searchable reference copy.
What year was the SERVICE DIRECTIVE BULLETIN 0053 published?
The SERVICE DIRECTIVE BULLETIN 0053 — the ENSTROM F28F service bulletins on file — is dated 1981.
Most owners only have the POH. Here's the essential set for the ENSTROM F28F.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
More ENSTROM F28Fmanuals & documents
- ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1Maintenance Manual
- SERVICE INFORMATION LETTER NO. 0183Service Bulletins
- Installation Instructions for Airwolf Aerospace LLC Tension – Torsion Strap AssembliesMaintenance Manual
- Enstrom F-28F Flight ChecklistChecklist
- Tail Rotor Drive Shaft AlignmentMaintenance Manual
- Proper Servicing of the Fuel Screens on Enstrom F Series Piston Engine HelicoptersMaintenance Manual
Related documents
- ENSTROM F-28/280 SERIES ILLUSTRATED PARTS CATALOGENSTROM F28C · Parts Catalog
- Proper Servicing of the Fuel Screens on Enstrom F Series Piston Engine HelicoptersENSTROM F28F · Maintenance Manual
- Installation Instructions for Airwolf Aerospace LLC Tension – Torsion Strap AssembliesENSTROM F28F · Maintenance Manual
- ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1ENSTROM F28F · Maintenance Manual
- Service Information Letter No. 0184ENSTROM F28C · Service Bulletins
In this document
Subject
Compliance to Avco Lycoming Service Bulletin No. 454 'Replacement of Oil Pump Impellers'.
Models
F28C, 280C, F28F, and 280F.
Effectivity
All helicopters with specified engine serial numbers, except those with compliance noted in the engine log book.
Procedures
Step-by-step instructions for removing the accessory case and replacing oil pump impellers.
Cautions
Warnings regarding the handling of components and the importance of proper reassembly.
Notes
Additional notes on specific model considerations and reference to the Maintenance Manual.
Safety notes
- Caution should be exercised during engine support operations.
- Avoid bending tach drive shaft as accessory case is moved.
- Use caution when removing the oil filter if it is to be reused.
Full document text
SERVICE DIRECTIVE BULLETIN 0053 Page 1 of 2 Date: April 30, 1981 Subject: Compliance to Avco Lycoming Service Bulletin No. 454 “Replacement of Oil Pump Impellers” Models: F28C, 280C, F28F and 280F Effectivity: All Helicopters with Engine Serial Numbers Noted in Attached Avco Lycoming Service Bulletin No. 454, Except Those With Engine Log Book Entries Indicating Compliance was Accomplished at the Enstrom Factory. The attached Avco Lycoming Service Bulletin No. 454 is being distributed to insure compliance on all Enstrom helicopters as noted above. Additional basic procedures for accessory case removal from the Enstrom helicopter are provided as follows: 1. Remove engine compartment bottom panel. 2. Start oil draining and set engine with #1 cylinder at top dead center on the compression stroke. 3. Remove seat cushions and firewall inspection panels. 4. Remove air filter box and hose. 5. Remove exhaust system. 6. Remove turbocharger and injector, as an assembly, from the mount brackets and injector bracket on sump. 7. Remove scavenge and fuel pump. 8. Remove turbo brackets and induction pipe. NOTE: On “F” models, do not remove throttle cable from turbocharger bracket. If you have to remove cable from bracket, mark or check location (Ref. Fig. 1) or rod end and cable sheath. When reassembling, return rod end and cable to same location to insure proper operation of the correlator. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTEDVisit www.enstromhelicopter.com to register for email notification of updates. SERVICE DIRECTIVE BULLETIN 0053 Page 2 of 2 9. Remove magnetos and set off to the side of the engine compartment. 10. Remove oil filter (use caution if it is to be reused). 11. Disconnect oil lines, breather and tach drive cable. 12. Slide back induction hose and remove hardware from sump. Remove sump. 13. Remove hardware from accessory case. 14. Support engine on a jack - CAUTION should be exercised during the following operations. 15. When engine is adequately supported, remove Lord mounts. 16. Lower engine slightly and slide accessory case back 1½ to 2 inches. CAUTION Avoid bending tach drive shaft as accessory case is moved. 17. Replace oil pump impellers per Avco Lycoming Service Bulletin No. 454. 18. Reinstall in reverse order. NOTE: Refer to the appropriate aircraft Maintenance Manual for torque and timing specifications. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTEDVisit www.enstromhelicopter.com to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTEDVisit www.enstromhelicopter.com to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTEDVisit www.enstromhelicopter.com to register for email notification of updates.