SECTION 4
NORMAL PROCEDURES
PA-28-181, ARCHER ill
4.13 NOISE LEVEL
(a) 14 CFR Parl 36, Appendix G for aircraft with the standard exhaust
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system, the noise level is 73. l dB(A). For aircraft with the optional
exhaust system, the noise level is 71.9 dB(A).
No determination has been made by the Federal Aviation
Administration that the noise levels of this airplane are or should be
acceptable or unacceptable for operation at, into, or oul of, any airport.
The above statement notwithstanding, the noise level stated above has
been verified by and approved by the Federal A via ti on Administration
in noise level test flights conducted in accordance with 14 CFR Part 36,
Noise Standards - Aircraft Type and Airworthiness Certification. This
aircraft model is in compliance with all 14 CFR Part 36 noise standards
applicable to this type.
(b) ICAO Annex 16, Volume I, Chapter 10 for aircraft with the standard
exhaust system, the noise level is 77.7 dB(A). For aircraft with the
optional exhaust system, the noise level is 75.3 dB(A).
4.15 RECOMMENDED PROCEDURES FOR ELIMINATION OF FUEL
VAPOR
Fuel vapor can occur in the fuel system during ground operations when high
ambient temperatures are present. The symptoms of fuel vapor can include:
(a) Fluctuation of idle speed and fuel flow
(b) Poor engine response to lhrollle movement
(c) Engine will not operate when throttle is closed
(d) High RPM drop (greater than 175 RPM) during mag check
If one or more symptoms of vapor in the fuel system occur during ground
operation, do the following:
(a) Advance the throttle to an engine speed of 1800 to 2000 RPM. Continue
at this power setting for - 1-2 minutes or until smooth engine operation.
Make sure oil temperature stays within limits.
(b) Retard throttle to idle and check for smooth operation.
(c) During taxi, lean mixture and operate at as high a power setting (1200
RPM max) as practical.
(d) Prior to takeoff, sel the mixture lo the full rich position (for high
elevation fields, mixture leaning could be necessary for smooth engine
operation).
(e) Prior to initiation of takeoff roll, set full throttle and verify smooth
engine operation.
REPORT: VB-2749
4-26
ISSUED: December 22, 2017
REVISED: January 9, 2019
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