Federal Aviation Administration, DOT

Pt. 29
(4) From 100 MHz to 8 GHz, use radiated
susceptibility tests at a minimum of 5 V/m.

TABLE III. - HIRF ENVIRONMENT III
Field strength
(volts/meter)

Frequency

Peak
10 kHz-100 kHz ................................
100 kHz-400 MHz .............................
400 MHz-700 MHz ...........................
700 MHz-1 GHz ................................
1 GHz-2 GHz ....................................
2 GHz-4 GHz ....................................
4 GHz-6 GHz ....................................
6 GHz-8 GHz ....................................
8 GHz-12 GHz ..................................
12 GHz-18 GHz ................................
18 GHz-40 GHz ................................

150
200
730
1,400
5,000
6,000
7,200
1,100
5,000
2,000
1,000

[Doc. No. FAA-2006-23657, 72 FR 44027, Aug. 6,
2007]

Average
150
200
200
240
250
490
400
170
330
330
420

PART 29 - AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY
ROTORCRAFT
Subpart A - General
Sec.
29.1 Applicability.
29.2 Special retroactive requirements.

spaschal on DSK3GDR082PROD with CFR

In this table, the higher field strength applies at the frequency band edges.

(d) Equipment HIRF Test Level 1. (1) From 10
kilohertz (kHz) to 400 megahertz (MHz), use
conducted susceptibility tests with continuous wave (CW) and 1 kHz square wave modulation with 90 percent depth or greater. The
conducted susceptibility current must start
at a minimum of 0.6 milliamperes (mA) at 10
kHz, increasing 20 decibels (dB) per frequency decade to a minimum of 30 mA at 500
kHz.
(2) From 500 kHz to 40 MHz, the conducted
susceptibility current must be at least 30
mA.
(3) From 40 MHz to 400 MHz, use conducted
susceptibility tests, starting at a minimum
of 30 mA at 40 MHz, decreasing 20 dB per frequency decade to a minimum of 3 mA at 400
MHz.
(4) From 100 MHz to 400 MHz, use radiated
susceptibility tests at a minimum of 20 volts
per meter (V/m) peak with CW and 1 kHz
square wave modulation with 90 percent
depth or greater.
(5) From 400 MHz to 8 gigahertz (GHz), use
radiated susceptibility tests at a minimum
of 150 V/m peak with pulse modulation of 4
percent duty cycle with a 1 kHz pulse repetition frequency. This signal must be switched
on and off at a rate of 1 Hz with a duty cycle
of 50 percent.
(e) Equipment HIRF Test Level 2. Equipment
HIRF test level 2 is HIRF environment II in
table II of this appendix reduced by acceptable aircraft transfer function and attenuation curves. Testing must cover the frequency band of 10 kHz to 8 GHz.
(f) Equipment HIRF Test Level 3. (1) From 10
kHz to 400 MHz, use conducted susceptibility
tests, starting at a minimum of 0.15 mA at 10
kHz, increasing 20 dB per frequency decade
to a minimum of 7.5 mA at 500 kHz.
(2) From 500 kHz to 40 MHz, use conducted
susceptibility tests at a minimum of 7.5 mA.
(3) From 40 MHz to 400 MHz, use conducted
susceptibility tests, starting at a minimum
of 7.5 mA at 40 MHz, decreasing 20 dB per frequency decade to a minimum of 0.75 mA at
400 MHz.

Subpart B - Flight
GENERAL
29.21 Proof of compliance.
29.25 Weight limits.
29.27 Center of gravity limits.
29.29 Empty weight and corresponding center of gravity.
29.31 Removable ballast.
29.33 Main rotor speed and pitch limits.
PERFORMANCE
29.45 General.
29.49 Performance at minimum operating
speed.
29.51 Takeoff data: general.
29.53 Takeoff: Category A.
29.55 Takeoff decision point (TDP): Category A.
29.59 Takeoff path: Category A.
29.60 Elevated heliport takeoff path: Category A.
29.61 Takeoff distance: Category A.
29.62 Rejected takeoff: Category A.
29.63 Takeoff: Category B.
29.64 Climb: General.
29.65 Climb: All engines operating.
29.67 Climb: One engine inoperative (OEI).
29.71 Helicopter angle of glide: Category B.
29.75 Landing: General.
29.77 Landing Decision Point (LDP): Category A.
29.79 Landing: Category A.
29.81 Landing distance: Category A.
29.83 Landing: Category B.
29.85 Balked landing: Category A.
29.87 Height-velocity envelope.
FLIGHT CHARACTERISTICS
29.141 General.
29.143 Controllability and maneuverability.
29.151 Flight controls.
29.161 Trim control.
29.171 Stability: general.
29.173 Static longitudinal stability.
29.175 Demonstration of static longitudinal
stability.
29.177 Static directional stability.
29.181 Dynamic stability: Category A rotorcraft.

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