53-20 Fairing, Cowlings, and Panels
CAUTION
Mast fairing, cowlings, and panels must be installed for flight.
53-21 Engine Cowling
A. Removal
1. Refer to Figure 53-1. Open G040-1 engine cowling assembly right and left doors.
2. Loosen clamp securing starter-generator hose to air inlet. Slide hose off of inlet.
3. Remove screws securing cowling to fuselage, unfasten cowling doors, and
remove cowling.
B. Installation
1. Refer to Figure 53-1. Position G040-1 engine cowling assembly on helicopter,
fasten cowling doors, and install screws securing cowling to fuselage.
2. Slide starter-generator hose onto air inlet and tighten clamp. Close right and left
doors.
3. Ensure G039 ring is centered on exhaust weldment within 0.1 inch. Remove and
reinstall/replace ring as required.
53-22 Mast Fairing
A. Opening and Closing
1. Refer to Figure 53-1. Remove right-side screws securing F261-1 mast fairing
assembly at aft, vertical seam.
2. Remove right-side screws securing fairing to ribs. Keep fairing from springing
open and minimize strain on nutplates by holding fairing closed until all right-side
screws are removed. Slowly open fairing.
3. Hold fairing closed. Install right-side screws securing fairing to ribs, and screws
securing fairing at aft, vertical seam.
B. Removal
1. Open mast fairing assembly per § 53-22 Part A.
2. Disconnect (pitot system) 15-4-N-O union near G201-1 (servo support) frame
assembly. Cap fitting and plug line.
3. Remove remaining screws securing fairing to ribs and remove fairing.
APR 2019 Chapter 53 Fuselage Page 53.3
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