CHAPTER 52
DOORS AND WINDOWS
52-00 Description
The R66 has four passenger doors and one main baggage compartment door. All four
cabin doors may be removed and installed by maintenance personnel or pilots.
Passenger doors are constructed of fiberglass and thermoplastics. Passenger doors, locks,
weather seal, gas springs, and door vents and hinges may be replaced, and vent pivot
friction may be adjusted.
Two windshield halves are retained in aluminum frames and an aluminum tubular bow
oriented vertically along the helicopter’s centerline. A standard (acrylic) windshield
installation and an impact-resistant (polycarbonate) windshield installation are available.
Refer to § 52-30 for detailed description.
52-10 Door Assembly
A. Cleaning
Refer to § 20-10 Part B for cleaning windows.
B. Removal
1. Refer to Figures 52-1 and 52-2. To disconnect door from gas spring mechanism:
a. Forward Doors: Pull D573-4 rod up and off of arm assembly ball joint.
b. Aft Doors: Insert flat-tip screwdriver and pry up spring clip locking C394-1
gas spring to channel ball joint. Pull gas spring up and off of ball joint.
2. Remove rings from door hinge pins, lift pins up from door frame hinge assemblies,
and remove door.
3. Adjust weight and balance per R66 Pilot’s Operating Handbook Section 6.
C. Installation
WARNING
Failure to install a ring in each door's two hinge pins may allow
door to depart aircraft in flight.
1. Refer to Figures 52-1 and 52-2. Align and insert door hinge pins in door frame
hinge assemblies.
2. Align forward door D573-4 rod with arm assembly ball joint, or aft door C394-1
gas spring with channel ball joint, and push down to lock.
3. Install rings in door hinge pins.
4. Adjust weight and balance per R66 Pilot’s Operating Handbook Section 6.
JUL 2020 Chapter 52 Doors and Windows Page 52.1
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