ENSTROM 280FX OPERATOR’S MANUAL 10-12-3
FAA Approved: Mar 26/12 Rev. 6
Report No. 28-AC-020 Feb 21/12
SUPPLEMENT 12
ENGINE EXHAUST MUFFLER
SECTION I. GENERAL
10-12-1. Introduction
This supplement must be attached to the Basic Rotorcraft
Flight Manual when the aircraft is equipped with an Wall-
Colomony P/N ENX-0001 or an Enstrom P/N 28-12577-1
muffler. Operation in compliance with the Basic Rotorcraft
Flight Manual is mandatory except as modified by this
supplement. Other approved sections and supplemental data
are recommended procedures.
10-12-2. Description
The muffler is installed in place of the standard exhaust
tailpipe. No further modification to the aircraft is necessary.
The muffler is one pound heavier than the tailpipe which it
replaces.
SECTION II. OPERATING LIMITATIONS
Same as Basic Rotorcraft Flight Manual.
SECTION III. EMERGENCY AND MALFUNCTION
PROCEDURES
Same as Basic Rotorcraft Flight Manual.
SECTION IV. NORMAL PROCEDURES
Same as Basic Rotorcraft Flight Manual.
SECTION V. PERFORMANCE
The slight increase in exhaust back pressure at high power
settings reduces the engine power output such that the
maximum hover weight must be reduced 60 pounds from
that shown in Figures 5-3 and 5-4. The engine limits remain
at 39.0 inches-Hg MP and 3050 RPM.
SECTION VI. WEIGHT AND BALANCE
Same as Basic Rotorcraft Flight Manual.
This electronic document is not linked to a subscription for revision control or distribution. Refer to theTechnical
Publications Status link under the Technical Support Page of the Enstrom Helicopter website for the current revision
level of the 280FX Rotorcraft Flight Manual.
UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED
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