570 

14 CFR Ch. I (1–1–19 Edition) 

Pt. 27, App. D 

29.45(a) and (b)(2)—General. 
29.49(a)—Performance at minimum operating 

speed. 

29.51—Takeoff data: General. 
29.53—Takeoff: Category A. 
29.55—Takeoff decision point: Category A. 
29.59—Takeoff Path: Category A. 
29.60—Elevated heliport takeoff path: Cat-

egory A. 

29.61—Takeoff distance: Category A. 
29.62—Rejected takeoff: Category A. 
29.64—Climb: General. 
29.65(a)—Climb: AEO. 
29.67(a)—Climb: OEI. 
29.75—Landing: General. 
29.77—Landing decision point: Category A. 
29.79—Landing: Category A. 
29.81—Landing distance (Ground level sites): 

Category A. 

29.85—Balked landing: Category A. 
29.87(a)—Height-velocity envelope. 
29.547(a) and (b)—Main and tail rotor struc-

ture. 

29.861(a)—Fire protection of structure, con-

trols, and other parts. 

29.901(c)—Powerplant: Installation. 
29.903(b) (c) and (e)—Engines. 
29.908(a)—Cooling fans. 
29.917(b) and (c)(1)—Rotor drive system: De-

sign. 

29.927(c)(1)—Additional tests. 
29.953(a)—Fuel system independence. 
29.1027(a)—Transmission and gearboxes: Gen-

eral. 

29.1045(a)(1), (b), (c), (d), and (f)—Climb cool-

ing test procedures. 

29.1047(a)—Takeoff cooling test procedures. 
29.1181(a)—Designated fire zones: Regions in-

cluded. 

29.1187(e)—Drainage and ventilation of fire 

zones. 

29.1189(c)—Shutoff means. 
29.1191(a)(1)—Firewalls. 
29.1193(e)—Cowling and engine compartment 

covering. 

29.1195(a) and (d)—Fire extinguishing sys-

tems (one shot). 

29.1197—Fire extinguishing agents. 
29.1199—Extinguishing agent containers. 
29.1201—Fire extinguishing system materials. 
29.1305(a) (6) and (b)—Powerplant instru-

ments. 

29.1309(b)(2) (i) and (d)—Equipment, systems, 

and installations. 

29.1323(c)(1)—Airspeed indicating system. 
29.1331(b)—Instruments using a power supply. 
29.1351(d)(2)—Electrical systems and equip-

ment: General (operation without normal 
electrical power). 

29.1587(a)—Performance information. 

N

OTE

: In complying with the paragraphs 

listed in paragraph C27.2 above, relevant ma-
terial in the AC ‘‘Certification of Transport 
Category Rotorcraft’’ should be used. 

[Doc. No. 28008, 61 FR 21907, May 10, 1996] 

A

PPENDIX

D 

TO

P

ART

27—HIRF E

NVI

-

RONMENTS

AND

E

QUIPMENT

HIRF 

T

EST

L

EVELS

 

This appendix specifies the HIRF environ-

ments and equipment HIRF test levels for 
electrical and electronic systems under 
§ 27.1317. The field strength values for the 
HIRF environments and laboratory equip-
ment HIRF test levels are expressed in root- 
mean-square units measured during the peak 
of the modulation cycle. 

(a) HIRF environment I is specified in the 

following table: 

T

ABLE

I.—HIRF E

NVIRONMENT

I 

Frequency 

Field strength 

(volts/meter) 

Peak Average 

10 kHz–2 MHz ...................................

50 

50 

2 MHz–30 MHz .................................

100 

100 

30 MHz–100 MHz .............................

50 

50 

100 MHz–400 MHz ...........................

100 

100 

400 MHz–700 MHz ...........................

700 

50 

700 MHz–1 GHz ................................

700 

100 

1 GHz–2 GHz ....................................

2,000 

200 

2 GHz–6 GHz ....................................

3,000 

200 

6 GHz–8 GHz ....................................

1,000 

200 

8 GHz–12 GHz ..................................

3,000 

300 

12 GHz–18 GHz ................................

2,000 

200 

18 GHz–40 GHz ................................

600 

200 

In this table, the higher field strength applies at the fre-

quency band edges. 

(b) HIRF environment II is specified in the 

following table: 

T

ABLE

II.—HIRF E

NVIRONMENT

II 

Frequency 

Field strength 

(volts/meter) 

Peak Average 

10 kHz–500 kHz ................................

20 

20 

500 kHz–2 MHz .................................

30 

30 

2 MHz–30 MHz .................................

100 

100 

30 MHz–100 MHz .............................

10 

10 

100 MHz–200 MHz ...........................

30 

10 

200 MHz–400 MHz ...........................

10 

10 

400 MHz–1 GHz ................................

700 

40 

1 GHz–2 GHz ....................................

1,300 

160 

2 GHz–4 GHz ....................................

3,000 

120 

4 GHz–6 GHz ....................................

3,000 

160 

6 GHz–8 GHz ....................................

400 

170 

8 GHz–12 GHz ..................................

1,230 

230 

12 GHz–18 GHz ................................

730 

190 

18 GHz–40 GHz ................................

600 

150 

In this table, the higher field strength applies at the fre-

quency band edges. 

(c) HIRF environment III is specified in the 

following table: 

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