Maintenance Practices; Helicopter Leveling; Plumb Bob Leveling - MD Helicopters MD Explorer Servicing And Maintenance

1.

Helicopter Leveling

Provisions are made in the design for a
leveling target on the cabin floor, allowing for
leveling the helicopter with a plumb bob. A
corresponding ceiling location for suspension of
a plumb bob relates to the floor leveling
marks.
The target is a rivet head located under the
carpet, near the aft left hand cabin door pillar.
A. Plumb Bob Leveling
(Ref. Figure 201)
Special Tools
(Ref. CSP−SPM)
Item Nomenclature
T201 Jack Pad Kit
T202 Helicopter Jack
T205 Plumb Bob
(1). Remove closeout panel, covering upper
aft left hand cabin door beam (4) (Ref.
Section 25-20-00).
MD Helicopters, Inc.
Rotorcraft Maintenance Manual
LEVELING

MAINTENANCE PRACTICES

(2). Locate keyhole slot (2) in upper aft left
hand cabin door beam (4).
(3). Attach plumb bob line (5) to keyhole
slot (2).
(4). Remove left cabin carpet (Ref. Section
25-20-00) from floor area (1).
(5). Locate unpainted rivet (3) for plumb
bob (5) alignment.
Airframe structure damage can
CAUTION
occur if stress panels are not in
place before jacking.
(6). Ensure all stress panels are installed
(Ref. Section 06-00-00).
Jacking
(7). Jack helicopter (Ref. Section 07-10-00).
(8). Adjust jacks (T202) until plumb bob is
in alignment with the leveling target
(3) (rivet head). This ensures aircraft
attitude is 0 degrees both longitudinally
and laterally.
08-20-00
CSP−900RMM−2
Page 201
Original