AC 36-1H

Advisory circular · Noise Levels for U.S. Certificated and Foreign Aircraft

Approved
May 25, 2012
Last reviewed
May 25, 2012
This change
Change 1 incorporated
Family
AC 36-1 · 2 versions
Revision
H, Change 1 Incorporated
14 CFR parts
36

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 21, 2025.

Show pages 333–344
Page 345Open in PDF

APPENDIX 9 MODEL

MANUFACTURER

DORNIER DO-28-D MTOW MLW 1000#

9.59

MFR, MODEL

ENGINE DATA SHPNO.

AIRCRAFT NOISE DATA FOR FOREIGN CERTIFICATED PROPELLER DRIVEN SMALL AIRPLANES (ICAO ANNEX 16, CHAPTER 6)

RPM MFG, MODEL

PROPELLER BLADESDIAM (IN) PITCHEXH PRATT+WHITNEY 2 399 HARTZELL HC-B-3TN-3D 100 3 VPT-6A-110

MDBA PC CDBA NOISE LEVEL (dBA)

70.8 -5.0 65.8 NOTES FOKKER P-149D

2.61 AVCO LYCOMING GO-480-B1A6 1 260 HARTZELL HC-A3V20-1D/V8433SP 85 3 V

68.8 -0.1 68.7 FUJI HEAVY IND.

FA-200-180

2.54 LYCOMING IO-360-B1B 1 180 MCCAULY B2D34-C53/74E-O 74 2 V

73.1 0.5 73.6

GREAT LAKES AIRCRAFT 2T-1A-2

1.80 LYCOMING AEIO-360-B1G6 1 177 HARTZELL HC-C2YK-4BF 74 2 V

74.4 -5.0 69.4

GULFSTREAM AMERICAN AA-1A

1.52 LYCOMING O-235-C2C 1 108 2500 MC CAULEY SCM1A105/7154 71 2 F

68.3 0.3 68.6

GULFSTREAM AMERICAN AA-5A

2.20 LYCOMING O-320-E2G 1 150 2680 MC CAULEY IC172/BTM7359 73 2 F

73.3 -0.6 72.7

LEICHTFLUG-TECHNIK LFU-205

2.65 LYCOMING IO-360-A1C 1 197 HARTZELL HC-C2YK-1B/F7666A-2 74 2 V

72.9 0.1 73.0

LET KONVICE BLANIK-L-13M

1.28 VK VW 1500-FR 1 50 HOFFMANN HO-11-130B-100D 51 2 F

59.5 59.5 MBB BO-208

1.39 CONTINENTAL 0-200-A 1 69 MCCAULY 1A-100MCM-6950 69 2 F

66.9 66.9 MBB BO-208

1.39 CONTINENTAL 0-200-A 1 99 MCCAULY 1A-100MCM-6955 69 2 F

67.3 67.3 MBB BO-208

1.39 CONTINENTAL O-200-A 1 99 MCCAULY 1A-100MCM-6758 67 2 F

67.5 -1.0 66.5 MBB BO-209

1.81 LYCOMING 0-320-E1F 1 147 HARTZELL HC-C2YL-1B/7663A-6 ` 76 2 V

70.7 -1.6 69.1 MBB BO-209

1.81 LYCOMING IO-320-D1A 1 157 HARTZELL HC-C2YL-1B/7663-SP 76 2 V

70.8 -3.2 67.6 MBB BO-209-FF

1.81 LYCOMING O-320-E2F 1 147 MCCAULY 1C-172MGM70-5-66 70 2 F

70.6 -0.9 69.7 Page 2

Page 346Open in PDF

APPENDIX 9 MODEL

MANUFACTURER MBB SIAT 223 MTOW MLW 1000#

2.31

MFR, MODEL

ENGINE DATA SHPNO.

AIRCRAFT NOISE DATA FOR FOREIGN CERTIFICATED PROPELLER DRIVEN SMALL AIRPLANES (ICAO ANNEX 16, CHAPTER 6)

RPM MFG, MODEL

PROPELLER BLADESDIAM (IN) PITCHEXH LYCOMING 1 197 HARTZELL HC-C2YK-1BF 76 2 VIO-360-C1D6

MDBA PC CDBA NOISE LEVEL (dBA)

72.8 72.8 NOTES

MORANE SAULNIER MS-885

1.87 CONTINENTAL 0-300-A 1 145 MCCAULY 1C-172MDM-7652 76 2 F

71.3 -0.3 70.3

MORAVAN CSSR ZLIN 43

2.98 MORAVAN M337A 1 168 AVIA-PRAHA V500A 79 2 V

71.7 1.4 73.1

MUDRY CAARP CAP 10

1.83 LYCOMING 10 360 B2F 1 241 2700 HOFFMANN MO 29 HM 80170 71 2 F

67.0 67.0

PARTENAVIA P 68 B

4.32 LYCOMING IO-360-A1B6 2 200 2700 HARTZELL HC-C2YK-2CF/FC7666A 72 2 V

79.6 -5.0 74.6

PILATUS BRITTEN BN 2A-2

6.31 LYCOMING IO-540-K1B5 2 300 2500 4 HARTZELL HC-C2YK-2CF/FC8477A 80 2 V

80.7 -5.0 75.7

PILATUS BRITTEN BN-2A MKIII-2

9.50 LYCOMING O-540-E4C5 3 260 2500 6 HARTZELL HC-2CYK-2CUF/FC8477 80 2 V

80.0 -2.0 78.0

PILATUS BRITTEN BN-2A MKIII-2

9.50 LYCOMING O-540-E4C5 3 260 2500 6 HARTZELL HC-C2YK-CUF/FC8477 78 2 V

79.4 -2.0 77.4

PILATUS BRITTEN BN-2A MKIII-3

10.01 LYCOMING O-540-E4C5 3 260 2500 6 HARTZELL HC-C2YK-2CUF/FC8477 80 2 V

80.0 -0.9 79.1

PILATUS BRITTEN BN-2A MKIII-3

10.01 LYCOMING O-540-E4C5 3 260 2500 6 HARTZELL HC-C2YK-2CUF/FC8477 78 2 V

79.4 -0.9 78.5

PILATUS BRITTEN BN-2A-2

6.31 LYCOMING IO-540-K1B5 2 300 2500 4 HARTZELL HC-C2YK-2CF/FC8477A 78 2 V

77.9 -5.0 72.9

PILATUS BRITTEN BN-2A-21

6.59 LYCOMING IO-540-K1B5 2 300 2500 4 HARTZELL HC-C2YK-2CF/FC8477A 80 2 V

80.7 -4.0 76.7

PILATUS BRITTEN BN-2A-21

6.59 LYCOMING IO-540-K1B5 2 300 2500 4 HARTZELL HC-C2YK-2CF/FC8477­ 78 2 V

77.9 -4.0 73.9

PILATUS BRITTEN BN-2A-6

6.30 LYCOMING O-54O-E4C5 2 256 HARTZELL HC-C2YK-2CF/FC8477A 79 2 V

82.3 -3.7 78.6 Page 3

Page 347Open in PDF

APPENDIX 9 MODEL

MANUFACTURER

PILATUS BRITTEN BN-2T MTOW MLW 1000#

6.59

MFR, MODEL

ENGINE DATA SHPNO.

AIRCRAFT NOISE DATA FOR FOREIGN CERTIFICATED PROPELLER DRIVEN SMALL AIRPLANES (ICAO ANNEX 16, CHAPTER 6)

RPM MFG, MODEL

PROPELLER BLADESDIAM (IN) PITCHEXH ALLISON 2 320 HARTZELL HC-C3YF-5F/FC8475FK­ 80 3 V250-B17C 4

MDBA PC CDBA NOISE LEVEL (dBA)

72.3 -4.1 68.2 NOTES

PILATUS-PORTER PC-6C1-H2/PC-6T

4.85 AIRESEARCH TPE331-1-100 1 576 HARTZELL HC-B3TN-5C/T10178C/­ 102 3 V

74.6 -5.0 69.6 PIPER PA-28-150

2.16 LYCOMING O-320-E2A 1 2700 SENSENICH M74-DM-58 74 2 F

70.6 0.9 71.5 POLISH PZL-104

2.87

2.87

PZL-FRANKLIN AI-14R 2 260 2050 2 US 122 104 2 V

72.3 -3.8 68.5 POLISH PZL-104 W/ T-05

2.87

2.87

PZL-FRANKLIN AI-14R 2 260 2050 5 US 122 104 2 V

65.4 -3.8 61.6 POLISH PZL-110

1.70

1.70

PZL-FRANKLIN 4A.235 B 2 125 2050 2 US 135 70 2 F

67.0 2.8 69.8

REIMS AVIATION F 152 II

1.68 LYCOMING C235 L2C 1 109 2550 MCCAULEY 1A 103/TCM 6958 69 2 F

65.7 -1.0 64.7

REIMS AVIATION F 172 M

2.29 LYCOMING C 320 E2D 1 150 2700 MCCAULEY 1C 16//DTM 7557 75 2 F

72.7 1.2 73.9

REIMS AVIATION F 172 N

2.29 LYCOMING C 320 H2AD 1 160 2700 MCCAULEY 1C 160/DTM 7557 75 2 F

73.4 -0.1 73.3

REIMS AVIATION F 182 P

2.95 CONTINENTAL 0 470 S 1 230 2600 MCCAULEY 2A 34C 66 82 2 V

77.4 -1.4 76.0

REIMS AVIATION F 182 Q

2.95

2.95

CONTINENTAL 0470 U 1 230 2400 MCCAULEY 2A 34C 204 82 2 V

72.1 -2.4 69.7

REIMS AVIATION FR 172K

2.56 CONTINENTAL 10 360 K 1 195 2600 MCCAULEY 2A 34C 203 77 2 V

73.2 -1.1 72.1

REIMS AVIATION FR 182

3.09 LYCOMING 0540J3CSD 1 235 2400 MCCAULEY B2D 34C 214 82 2 V

73.1 -2.5 70.6 ROBIN DR 400/120A

1.98

1.98

LYCOMING 0 235 L2A 1 118 2700 MCCAULEY 1A 135 DCM 7150 71 2 F

68.2 2.4 70.6 Page 4

Page 348Open in PDF

APPENDIX 9 MODEL

MANUFACTURER ROBIN DR 400/160 MTOW MLW 1000#

2.31

2.31

MFR, MODEL

ENGINE DATA SHPNO.

AIRCRAFT NOISE DATA FOR FOREIGN CERTIFICATED PROPELLER DRIVEN SMALL AIRPLANES (ICAO ANNEX 16, CHAPTER 6)

RPM MFG, MODEL

PROPELLER BLADESDIAM (IN) PITCHEXH LYCOMING 1 160 2700 SENSENICH 74 DM 65264 74 2 F0 320 D

MDBA PC CDBA NOISE LEVEL (dBA)

72.9 0.3 73.2 NOTES ROBIN DR 400/180

2.43

2.43

LYCOMING 0 360 A 3A 1 180 2600 SENSENICH 76EM855-064 76 2 F

72.2 0.9 73.1 ROBIN DR 400/180R

2.20

2.20

LYCOMING 0-360 A3A 1 180 2700 SENSENICH 76 EM 855058 76 2 F

74.1 -2.5 71.6 ROBIN DR400/120

1.98

1.98

LYCOMING 0 235-L2A 1 116 2700 SENSENICH 72 CKS-6-056 72 2 F

69.6 2.0 71.6 ROBIN HR 100-285

3.09

3.09

CONTINENTAL TIARA 6 285 B 1 285 4000 HOFFMANN 2000TR/MN 79 3 V

74.2 -1.3 72.9 ROBIN R 2112

1.76

1.76

LYCOMING 0 235 L2A 1 112 2600 SENSENICH 72 CK 56-056 72 2 F

67.3 0.2 67.5 ROBIN R 2160

1.76

1.76

LYCOMING 0 320 D 1 160 2600 SENSENICH 74DM65 5264 72 2 F

72.4 -2.6 69.8

SAAB FAIRCHILD MFI-15-200A

4.41 LYCOMING IO-360-A1B6 1 197 HARTZELL HC-2CYK-4BF 74 2 V

73.8 0.7 74.5

SCHEIBE FLUGZEUGBAU SF-25C

1.34 LIMBACH SL-1700-EA 1 48 HOFFMANN HO-11-150B-75L 59 2 F

58.3 -1.0 57.3

SCHEIBE FLUGZEUGBAU SF-27 M-B

0.85 HIRTH-MOT.BAU 171R-4E 1 28 HOFFMANN HO-02-120-50 47 2 F

67.7 0.2 67.9

SCHEMPP-HIRTH CM

1.50 BINDER MOT.BAU WB-2 1 52 HOFFMANN HO-11 158B-70 62 2 F

65.2 1.4 66.6

SCHEMPP-HIRTH NIMBUS-2M

1.32 SCHEMPP-HIRTH SM-1 (O-28280R) 1 50 HOFFMANN HO-11 145-B80 57 2 F

63.6 1.8 65.4 SHORT BROS.

SKYVAN

12.57 AIRESEARCH TPE-331-2-201A 2 715 HARTZELL HC-B3TN-SE/T10282HB 98 3 V

81.9 -4.7 77.2

SLINGSBY ENGINEERING T 67A

1.65 LYCOMING O-235-L2A 1 118 2800 2 HOFFMAN HO14-178-120 70 2 F

70.9 -2.3 68.6 Page 5

Page 349Open in PDF

APPENDIX 9 MODEL

MANUFACTURER SOC.AERONAUT.

JODEL D 140B MTOW MLW 1000#

2.65

MFR, MODEL

ENGINE DATA SHPNO.

AIRCRAFT NOISE DATA FOR FOREIGN CERTIFICATED PROPELLER DRIVEN SMALL AIRPLANES (ICAO ANNEX 16, CHAPTER 6)

RPM MFG, MODEL

PROPELLER BLADESDIAM (IN) PITCHEXH LYCOMING 1 177 SENSENICH 76EM8-0-60 76 2 F0-360-A2A

MDBA PC CDBA NOISE LEVEL (dBA)

74.0 0.2 74.2 NOTES SOCATA 110 ST

1.70 LYCOMING 0-235L-2A 1 110 2600 MCCAULEY 1A 103TCM 6958 69 2 F

67.6 1.0 68.6 SOCATA 150 SV

1.98 LYCOMING 0 326 D2A 1 160 2700 SENSENICH M 74 DM 61 74 2 F

73.8 -2.2 71.6 SOCATA 180 T

2.09

2.09

LYCOMING 0 360 A3A 1 180 2700 SENSENICH 76 EM8 060 76 2 F

73.1 -0.8 72.3 SOCATA 235 E

2.65

2.65

LYCOMING 0 540 B4B5 1 235 2575 HARTZELL HCC2 YK184684 80 2 V

74.3 -0.7 73.6 SOCATA 880 B

1.70

1.70

ROLLS ROYCE 0 200 A 1 100 2750 MCCAULEY 1A 101 DCM/6948 67 2 F

68.8 68.8 SOCATA 893 E

2.31

2.31

LYCOMING 0 360 A3A 1 185 2700 HOFFMANN HO 27 HM/186 135 73 2 F

71.3 71.3 SOCATA TB 10

2.29 LYCOMING 0-360-A1AD 1 180 2700 HARTZELL HC-C2YK-1BF-F7666-A 74 2 V

72.4 -0.9 71.5 SOCATA TB 9

2.34 LYCOMING 0 320 D2A 1 160 2700 SENSENICH 74 DM6 61 74 2 F

71.2 1.3 72.5 SPORTAVIA PUTZ.

ELSTER B

1.54 CONTINENTAL C90-12F 1 88 HOFFMANN HO-14-183 100 72 2 F

66.0 66.0 SPORTAVIA PUTZ.

RF-5

1.43 LIMBACH L2100-EIX 1 71 HOFFMANN HO-VR/L-150A 59 2 V

63.4 -1.3 62.1 SPORTAVIA PUTZ.

RF6-B

1.98 LYCOMING 0-320-A1B 1 150 HOFFMANN HO-23 178-145 70 2 F

71.2 -1.1 70.1 SPORTAVIA PUTZ.

RS-180

2.45 LYCOMING 0-360-A3A 1 180 MCCAULY 1A170/FFA7563 75 2 F

73.8 73.8 SPORTAVIA PUTZ.

RS-180

2.43 LYCOMING 0-360-A3A 1 180 HOFFMANN HO-27-HM-180138 70 2 F

66.8 -0.9 65.9 Page 6

Page 350Open in PDF

APPENDIX 9 MODEL

MANUFACTURER

WASSMER WA 80 MTOW MLW 1000#

1.76

MFR, MODEL

ENGINE DATA SHPNO.

AIRCRAFT NOISE DATA FOR FOREIGN CERTIFICATED PROPELLER DRIVEN SMALL AIRPLANES (ICAO ANNEX 16, CHAPTER 6)

RPM MFG, MODEL

PROPELLER BLADESDIAM (IN) PITCHEXH ROLLS ROYCE 1 134 2700 HOFFMANN HO 14.175.113 69 2 F0 200 A

MDBA PC CDBA NOISE LEVEL (dBA)

68.3 68.3 NOTES

ZAKLADY SZCYBOWCOWE SZD 45

1.54 LIMBACH SL-1700-EC 1 59 HOFFMANN HO-11-145 B75D 57 2 F

68.9 0.3 69.2 Page 7

Page 351Open in PDF

11/15/01 AC36-1H Appendix 9 Exhaust Configurations (Reciprocating Engines) 1 Stub Pipes 2 Small Collector, Short Exhaust Pipe 3 Turbine Or Turbocharger 4 Collector Wraparound Manifold Straight Pipe 5 Manifold Muffler Page 8

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APPENDIX 10 AIRCRAFT NOISE DATA FOR U.S. CERTIFICATED HELICOPTERS (14 CFR PART 36, APPENDIX H) MODEL

MANUFACTURER MGW MLW 1000# MFR, MODEL

ENGINE DATA NO.

MAIN ROTOR MFR, MODEL BLADES DIA(FT.)

TAIL ROTOR MFR, MODEL BLADES DIA(FT.) FO TO AP STAGE NOTES NOISE LEVEL (EPNdB) AGUSTA 6.28 PRATT&WHITNEY 2 AGUSTA 4 36.00 AGUSTA 2 6.60 90.8 91.4 91.4 2 A109E 6.28 206C AGUSTA 6.28 TURBOMECA 2 AGUSTA 4 36.00 AGUSTA 2 6.60 90.9 91.8 93.3 2 A109E 6.28 ARRIUS 2K1 AGUSTA 6.28 TURBOMECA 2 AGUSTA 4 36.00 AGUSTA 2 6.60 89.1 91.7 91.1 2 A109K2 6.28 ARRIEL 1K1 BELL HELI TEXTRON 4.45 ALLISON 1 BELL HELI TEXT 2 37.00 BELL HELI TEXT 2 5.40 85.2 88.4 90.7 2 206L-4 4.45 250-C30P 206-015-001-107 206-016-201-127 BELL HELI TEXTRON 8.40 ALLISON 2 BELL HELI TEXT 2 42.00 BELL HELI TEXT 2 6.83 90.5 89.1 94.2 2 230 FXD SKD GR 8.40 250-C30G/2 222-018-501-101 222-016-001-107 BELL HELI TEXTRON 8.40 ALLISON 2 BELL HELI TEXT 2 42.00 BELL HELI TEXT 2 6.83 90.8 89.1 94.2 2 230 RTR WHL GR 8.40 250-C30G/2 222-018-501-101 222-016-001-107 BELL HELI TEXTRON 11.90 PRATT&WHITNEY 2 BELL HELI TEXT 4 46.00 BELL HELI TEXT 2 8.60 93.4 92.8 95.6 2 412 HP 11.90 PT6T-3E 412-015-300-109 212-010-750-105 BELL HELI TEXTRON 11.90 PRATT&WHITNEY 2 BELL HELI TEXT 4 46.00 BELL HELI TEXT 2 8.60 93.4 93.2 95.6 2 412 SP 11.90 PT6T-3B 412-015-300-109 212-010-750-105 BELL HELI TEXTRON 11.90 PRATT&WHITNEY 2 BELL HELI TEXT 4 46.00 BELL HELI TEXT 2 8.60 93.4 92.8 95.6 2 412EP 11.90 PT6T-3D 412-015-300-109 212-010-750-105 BELL HELI TEXTRON 6.00 PRATT&WHITNEY 2 BELL HELI TEXT 4 37.00 BELL HELI TEXT 2 5.67 89.1 88.0 91.2 2 427 6.00 PW207D 427-015-001-125 427-016-001-109 BELL HELI TEXTRON 6.35 PRATT&WHITNEY 2 BELL HELI TEXT 4 37.00 BELL HELI TEXT 2 5.67 89.0 88.5 91.2 2 427 6.35 PW207D 427-015-001-125 427-016-001-109 BELL HELI TEXTRON 9.00 ALLISON 2 BELL HELI TEXT 4 42.00 BELL HELI TEXT 2 6.90 91.6 92.4 93.8 2 430 9.00 250-C40B 430-015-001-101 222-016-001-111 BOEING 3.35 ALLISON 1 MCDONNELL DOUG 5 27.35 MCDONNELL DOUG 80.2 85.4 87.9 2 MD 520N 3.35 250-C20R/2 369D21102-503 NOTAR EHI 31.50 GE 3 5 61.00 4 13.10 93.1 97.6 99.5 2 EH 101/300/500 31.50 CT7-6A EUROCOPTER 20.20 TURBOMECA 2 4 53.10 4 10.40 93.2 94.2 96.5 2 AS 332L2 20.20 MAKILA 1A2 Page 1

Page 353Open in PDF

APPENDIX 10 AIRCRAFT NOISE DATA FOR U.S. CERTIFICATED HELICOPTERS (14 CFR PART 36, APPENDIX H) MODEL

MANUFACTURER MGW MLW 1000# MFR, MODEL

ENGINE DATA NO.

MAIN ROTOR DIA(FT.)MFR, MODEL BLADES

TAIL ROTOR MFR, MODEL BLADES DIA(FT.) FO TO NOTES NOISE LEVEL (EPNdB)

STAGEAP EUROCOPTER 4.96 TURBOMECA 1 AEROSPATIALE 3 35.07 AEROSPATIALE 2 6.10 87.1 89.8 91.4 2 AS 350 B2 ARRIEL 1D1 355A31.0001 355A12.0031 OR 0040 EUROCOPTER 4.63 TURBOMECA 1 3 35.10 2 6.10 86.8 91.1 91.3 2 AS 350BA 4.63 ARRIEL 1B EUROCOPTER 5.60 TURBOMECA 2 EUROCOPTER 3 35.60 EUROCOPTER 2 6.20 86.2 88.8 92.9 2 AS 355 N 5.40 ARRIUS 1A/4M STARFLEX 355A340004­ 350A33-0008-03/04 EUROCOPTER 5.29 ALLISON 2 3 35.10 2 6.10 87.6 89.0 93.8 2 AS 355F2R 5.29 250-C20F EUROCOPTER 5.60 TURBOMECA 2 3 35.10 2 6.10 86.2 88.8 92.9 2 AS 355N 5.60 ARRIUS 3191M EUROCOPTER 9.37 TURBOMECA 2 4 39.20 11 3.60 91.0 93.3 96.1 2 AS 365N2 9.37 ARRIEL 1C2 EUROCOPTER 7.39 LYCOMING 2 4 36.10 2 6.40 90.8 90.0 96.0 2 BK 117B2 7.39 LTS-101-750B1 EUROCOPTER 7.39 TURBOMECA 2 4 36.10 2 6.40 89.7 90.6 96.0 2 BK 117C1 7.39 ARRIEL 1E2 SIKORSKY 10.80 TURBOMECA 2 SIKORSKY 4 44.00 SIKORSKY 4 8.00 92.8 92.5 95.6 2 S-76A STC:568NE 10.80 ARRIEL 1S 76150-9000/09100 76101-05101-041 SIKORSKY 11.70 TURBOMECA 2 SIKORSKY 4 44.00 SIKORSKY 4 8.00 93.2 96.0 97.7 2 S-76C 11.70 ARRIEL 1S1 76150-09199-41 76101-05501-041 SIKORSKY 11.70 TURBOMECA 2 SIKORSKY 4 44.00 SIKORSKY 4 8.00 91.6 93.9 96.1 2 S-76C+ (PLUS) 11.70 ARRIEL 2S1 76150-09100-41 76101-05501-041 Page 2

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11/15/01 AC36-1H Appendix 10

EQUATIONS FOR THE CALCULATION OF NOISE CERTIFICATION LIMITS

AT TAKEOFF, SIDELINE, AND APPROACH STAGE 2 Takeoff Limits Flyover Limits Approach Limits (EPNdB) (EPNdB) (EPNdB) Up to and including 1,764 pounds 89 88 90 W W Wlog log log1 764 89 + 301 , 88 + 3 01.. {{{{{{ 1 764 ,

log 2 1 764 ,

log 2 { { {{ { { 3 01 {{ . {{ { { Between 1,764 pounds and 176,370 pounds 90 + log 2 { { { { { { 176,370 pounds or more 109 108 110 Page 3

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11/15/01 AC36-1H

Appendix 10

NOISE CERTIFICATION REQUIREMENTS - HELICOPTERS

TAKEOFF 109 85 90 95 100 105 110 115 EPNL Stage 2 89 1 10 100 1000

Takeoff Weight (1,000 lbs) Page 4

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Appendix 10

NOISE CERTIFICATION REQUIREMENTS - HELICOPTERS

SIDELINE 108 85 90 95 100 105 110 115 EPNL 88 Stage 2 1 10 100 1000

Takeoff Weight (1,000 lbs) Page 5