806
14 CFR Ch. I (1–1–14 Edition)
§ 29.1322
(f) Instrument panel vibration may
not damage, or impair the readability
or accuracy of, any instrument.
(g) If a visual indicator is provided to
indicate malfunction of an instrument,
it must be effective under all probable
cockpit lighting conditions.
(Secs. 313(a), 601, 603, 604, and 605 of the Fed-
eral Aviation Act of 1958 (49 U.S.C. 1354(a),
1421, 1423, 1424, and 1425); and sec. 6(c), Dept.
of Transportation Act (49 U.S.C. 1655(c)))
[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as
amended by Amdt. 29–14, 42 FR 36972, July 18,
1977; Amdt. 29–21, 48 FR 4391, Jan. 31, 1983]
§ 29.1322
Warning, caution, and advi-
sory lights.
If warning, caution or advisory lights
are installed in the cockpit they must,
unless otherwise approved by the Ad-
ministrator, be—
(a) Red, for warning lights (lights in-
dicating a hazard which may require
immediate corrective action);
(b) Amber, for caution lights (lights
indicating the possible need for future
corrective action);
(c) Green, for safe operation lights;
and
(d) Any other color, including white,
for lights not described in paragraphs
(a) through (c) of this section, provided
the color differs sufficiently from the
colors prescribed in paragraphs (a)
through (c) of this section to avoid pos-
sible confusion.
[Amdt. 29–12, 41 FR 55474, Dec. 20, 1976]
§ 29.1323
Airspeed indicating system.
For each airspeed indicating system,
the following apply:
(a) Each airspeed indicating instru-
ment must be calibrated to indicate
true airspeed (at sea level with a stand-
ard atmosphere) with a minimum prac-
ticable instrument calibration error
when the corresponding pitot and stat-
ic pressures are applied.
(b) Each system must be calibrated
to determine system error excluding
airspeed instrument error. This cali-
bration must be determined—
(1) In level flight at speeds of 20
knots and greater, and over an appro-
priate range of speeds for flight condi-
tions of climb and autorotation; and
(2) During takeoff, with repeatable
and readable indications that ensure—
(i) Consistent realization of the field
lengths specified in the Rotorcraft
Flight Manual; and
(ii) Avoidance of the critical areas of
the height-velocity envelope as estab-
lished under § 29.87.
(c) For Category A rotorcraft—
(1) The indication must allow con-
sistent definition of the takeoff deci-
sion point; and
(2) The system error, excluding the
airspeed instrument calibration error,
may not exceed—
(i) Three percent or 5 knots, which-
ever is greater, in level flight at speeds
above 80 percent of takeoff safety
speed; and
(ii) Ten knots in climb at speeds from
10 knots below takeoff safety speed to
10 knots above V
Y
.
(d) For Category B rotorcraft, the
system error, excluding the airspeed
instrument calibration error, may not
exceed 3 percent or 5 knots, whichever
is greater, in level flight at speeds
above 80 percent of the climbout speed
attained at 50 feet when complying
with § 29.63.
(e) Each system must be arranged, so
far as practicable, to prevent malfunc-
tion or serious error due to the entry of
moisture, dirt, or other substances.
(f) Each system must have a heated
pitot tube or an equivalent means of
preventing malfunction due to icing.
[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964 as
amended by Amdt. 29–3, 33 FR 970, Jan. 26,
1968; Amdt. 29–24, 49 FR 44439, Nov. 6, 1984;
Amdt. 29–39, 61 FR 21901, May 10, 1996; Amdt.
29–44, 64 FR 45338, Aug. 19, 1999]
§ 29.1325
Static pressure and pressure
altimeter systems.
(a) Each instrument with static air
case connections must be vented to the
outside atmosphere through an appro-
priate piping system.
(b) Each vent must be located where
its orifices are least affected by airflow
variation, moisture, or foreign matter.
(c) Each static pressure port must be
designed and located in such manner
that the correlation between air pres-
sure in the static pressure system and
true ambient atmospheric static pres-
sure is not altered when the rotorcraft
encounters icing conditions. An anti-
icing means or an alternate source of
static pressure may be used in showing
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