SECTION 2 LIMITATIONS

heat ON to avoid possible engine flameout. Minimum crew is one pilot in the right front seat. A flight instructor may act as pilot in command from the left front seat. Solo flight from right seat only. Forward left seat belt must be buckled. Operation up to 100 KIAS approved with any combination of cabin doors removed. All seat belts must be buckled and loose items in cabin must be properly secured during doors- off flight. A functioning headset must be worn by each pilot. FAA APPROVED: 15 AUG 2023 2-5 ROBINSON MODEL R66 SECTION 2 LIMITATIONS FAA APPROVED: 2 DEC 2015 2-6 KINDS OF OPERATION LIMITATIONS VFR day and night operations are approved. VFR operation at night is permitted only when landing, navigation, instrument, and anti-collision lights are operational. Orientation during night flight must be maintained by visual reference to ground objects illuminated solely by lights on the ground or adequate celestial illumination. NOTE There may be additional requirements in countries outside the United States. ENVIRONMENTAL LIMITATIONS Maximum ambient temperature for operation is ISA plus 35°C (ISA plus 63°F), limited to 50°C (122°F). Minimum ambient temperature for operation is -40°C (-40°F) at all altitudes. NOTE See fuel limitations for temperature restrictions. Flight in known icing conditions prohibited. Engine anti-ice must be on for operation in visible moisture in ambient temperatures at or below 4°C (40°F). FUEL LIMITATIONS APPROVED FUEL GRADES Grade (Specification) Operating Limits Jet A or Jet A-1 (ASTM D1655) Anti-icing additive may be required (see below). Not approved for ambient tem- peratures below –32ºC (–25ºF). Jet B (ASTM D6615) Anti-icing additive may be required (see below). Not approved for ambient tem- peratures above 32ºC (90ºF) at altitudes above 5000 feet. JP-4 (MIL-DTL-5624) Not approved for ambient temperatures above 32ºC (90ºF) at altitudes above 5000 feet. JP-5 (MIL-DTL-5624 Not approved for ambient temperatures below –32ºC (–25ºF). JP-8 (MIL-DTL-83133) Not approved for ambient temperatures below –32ºC (–25ºF). No. 3 Jet Fuel (P.R. China GB 6537-2006) Anti-icing additive may be required (see below). Not approved for ambient tem- peratures below –32ºC (–25ºF). TC-1 or PT (Russian Standard GOST 10227) No temperature restrictions. Aviation fuel additives grades И (Fluid I) and ИM (Fluid IM) with a concentration of 0.1 – 0.3% by volume are approved for anti-icing. Anti-icing additive conforming to MIL-DTL-85470 must be added to Jet A, Jet A-1, Jet B, or No. 3 Jet Fuel when ambient temperature is below 4ºC (40ºF). Check with fuel supplier to determine if supply includes additive. If not, add per manufacturer’s instructions. FUEL CAPACITY Total capacity: 74.6 US gallons (282 liters) Usable capacity: 73.6 US gallons (279 liters) ROBINSON MODEL R66 SECTION 2 LIMITATIONS FAA APPROVED: 21 JUN 2021 2-7 ROBINSON MODEL R66 SECTION 2 LIMITATIONS FAA APPROVED: 19 OCT 2016 2-8 INSTRUMENT MARKINGS NOTE Red lines offset so instrument pointer should not enter red. See color code on page 2-1. AIRSPEED INDICATOR Green arc 0 to 110 KIAS Yellow arc* 110 to 140 KIAS Red cross-hatch 100 KIAS Red Line 140 KIAS *Earlier airspeed indicators without yellow arc must have the following placard adjacent: DO NOT EXCEED 110 KIAS EXCEPT IN SMOOTH AIR ROTOR TACHOMETER Lower red line 88% Green arc 88 to 106% Upper red line 106% ENGINE TACHOMETER (N2) Yellow arc 75 to 88%** Power on – transient operation only. (No restrictions during autorotation.) Lower red line 99% Green arc 99 to 101% Upper red line 101% **Earlier tachometers with yellow arc from 78 to 88% must have the following placard adjacent: TRANSIENT OPERATION ONLY 75–88% N2 NO RESTRICTIONS DURING AUTOROTATION GAS PRODUCER TACHOMETER (N1) Green arc 60 to 105% Red line 105% White triangle 16% (Later tachometers. Recommended fuel ON during normal start) INSTRUMENT MARKINGS (cont’d) MEASURED GAS TEMPERATURE Green arc 150 to 706ºC Yellow arc (5 minute limit) 706 to 782ºC Red line 782ºC Red dot (start limit) 927ºC ENGINE OIL TEMPERATURE Green arc 0 to 107ºC Red Line 107ºC ENGINE OIL PRESSURE Lower red line 50 psi Yellow arc (below 78% N1 ) 50 to 90 psi Green arc 90 to 130 psi Yellow arc (start and warm up) 130 to 150 psi Upper red line 150 psi TORQUE Green arc 0 to 83% Yellow arc (5 minute limit) 83 to 100% Red line 100% AMMETER Green arc 0 to 160 amps Red line 160 amps ROBINSON MODEL R66 SECTION 2 LIMITATIONS FAA APPROVED: 19 OCT 2016 2-9 ROBINSON MODEL R66 SECTION 2 LIMITATIONS FAA APPROVED: 19 OCT 2016 2-10 PLACARDS Adjacent to pilot’s cyclic grip: Near fuel tank filler cap: FUEL GRADE JET A, JET A1, JET B OR AS SPECIFIED IN PILOT’S HANDBOOK ANTI-ICE ADDITIVE MAY BE REQUIRED SEE PILOT’S HANDBOOK POWER-ON Vne- KIAS PRESS OAT-°C ALT-FT -40 -30 -20 -10 0 10 20 30 40 50 SL 129 I 127 2000 124 130 126 122 4000 119 127 129 125 121 117 114 6000 114 122 125 121 117 113 108 8000 109 117 121 116 112 107 102 97 10000 105 112 112 106 101 96 91 86 12000 100 106 101 95 90 14000 96 95 89 NO FLIGHT 16000 90 BELOW 2200 LB (998 KG) TOGW, ADD 10 KIAS NOTE: 65 KIAS MAXIMUM ABOVE 83% TORQUE AUTOROTATION Vne - KIAS PRESS OAT-°C ALT-FT -40 -30 -20 -10 0 10 20 30 40 I 50 6000 I 8000 100 99 94 89 10000 98 93 88 83 78 12000 98 93 87 82 14000 93 87 81 NO FLIGHT 16000 82 PLACARDS (cont’d) Near fuel gage: 73.6 US GAL 279 LITERS In clear view of pilot: SEE PILOT’S HANDBOOK FOR SOLO PILOT WEIGHT LESS THAN 160 LB (73 KG) THIS ROTORCRAFT APPROVED FOR DAY AND NIGHT VFR OPERATIONS LOW-G PUSHOVERS PROHIBITED On removable cyclic grip: SOLO FROM RIGHT SEAT ONLY On or near collective controls: NO STOWAGE KEEP AREA CLEAR In clear view of all occupants: NO SMOKING Inside cabin above each cabin door: EXIT Inside each cabin door near door handle: TO CLOSE: SLIDE HANDLE AFT AND DOWN TO OPEN: LIFT HANDLE AND SLIDE FORWARD ROBINSON MODEL R66 SECTION 2 LIMITATIONS FAA APPROVED: 19 OCT 2016 2-11 ROBINSON MODEL R66 SECTION 2 LIMITATIONS FAA APPROVED: 19 OCT 2016 2-12 PLACARDS (cont’d) Near lock on rear cabin doors: PUSH TO LOCK DO NOT LOCK IN FLIGHT Inside each under-seat compartment: CAUTION DO NOT EXCEED THE FOLLOWING: • COMPARTMENT CAPACITY: 50 LB (23 KG) • COMBINED SEAT PLUS COMPARTMENT: 300 LB (136 KG) • MAX FILL LINE SEE PILOT’S HANDBOOK FOR ADDITIONAL LOADING INSTRUCTIONS. Inside main baggage compartment: CAUTION • MAXIMUM DISTRIBUTED FLOOR LOAD: 50 LB/FT2 (244 KG/M2 ) • MAXIMUM TOTAL COMPARTMENT LOAD: 300 LB (136 KG)