Specifications

RotorWay International

Exec 162F Maintenance Manual

Section 2: Tail Boom

The main purpose of the tail boom in all conventional helicopters is to provide a mounting location for the anti-torque

system or tail rotor. Its secondary purpose is to mount the vertical and horizontal trim fins which are used to stabilize the

aircraft in forward flight, opposing aerodynamic forces from the windscreen and body.

The material used for the tail boom skin is aircraft industry standard, grade T-3 aluminum and is .025 thick. The sheet is

rolled in a cone shape to provide structural integrity.

Reference prints: E09-2000, E09-2001

SERVICE NOTES:

1. The tail boom is subject to most of its stress during take off and landing. The skin and its associated parts are subject

to high frequency vibrations that can cause stress cracks and generate loose rivets and bolts.

A. Stress cracks: Upon inspection of the tail boom skin, if you find that stress cracks have started, drill a small hole

at the very end of the crack. This hole will stop any further migration of the crack. The size of the drilled hole will

depend on the severity of the crack.

B. Loose rivets: Using the appropriate sized drill bit (depending upon the size and head diameter of the rivet), drill

out the head of the rivet by rotating the drill in an elliptical manner. This will remove the head without drilling

through the rivet hole. Then use a rivet shank or a small punch to knock out the remainder of the rivet. Clean the

area and deburr the hole if necessary. Replace the rivet using the original type and size.

2. Inspect the Vertical Fin bracket at bend areas for cracks. Also inspect the mounting holes outward to the edge of the

bracket.

INSPECTION CHART

PART NO.

E09-9000 Tail Boom 100 HR 2000 HR/OC 2-1

E09-9010 Vertical Trim Fin 100 HR 2000 HR/OC Rivet inspection

E09-9021 Horizontal Trim Fins 100 HR 2000 HR/OC Rivet inspection

E09-3252 Vertical Trim Fin Bracket 100 HR 2000 HR 2-2

E00-2300 AN3-4A (3/16 x 1/2) Bolt 50 HR 2000 HR Torque

E00-2301 AN3-5A (3/16 x 5/8) Bolt 100 HR 2000 HR Torque

E00-2303 AN3-6A (3/16 x 3/4) Bolt 50 HR 2000 HR Torque

E00-2305 AN3-11A (3/16 x 1-1/8) Bolt 100 HR 2000 HR Torque

E00-2306 AN3-12A (3/16 x 1-1/4) Bolt 50 HR 2000 HR Torque

E00-2307 AN3-13A (3/16 x 1-3/8) Bolt 50 HR 2000 HR Torque

E00-2308 AN3-15A (3/16 x 1-5/8) Bolt 50 HR 2000 HR Torque

E00-2309 AN3-17A (3/16 x 1-7/8) Bolt 100 HR 2000 HR Torque

E00-2414 AN4-23A (1/4 x 2-3/8) Bolt 100 HR 2000 HR Torque

E00-2432 AN4-12A (1/4 x 1-1/4) Bolt 50 HR 2000 HR Torque

SERVICE

REFERENCE

INSPECTION

INTERVAL

R.C.O.