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SECTION  VI.  MANEUVERING LIMITS
Table  5-7-1.     Bypass Panel Removal Requirement

TM-1-1520-240-10 Army CH-47D Heilcopter (EIC:RCD) Manual
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TM 1-1520-240-10 Change 1          5-7-1 SECTION  VII.  ENVIRONMENTAL RESTRICTIONS 5-7-1.  Engine Inlet Screen Limitation. Refer to table 5-7-1 for information on engine bypass panel removal. 5-7-2.  Flight Under Instrument Meteorological Con- ditions (IMC). This helicopter is qualified for flight instrument metero- logical conditions provided the following conditions exist: NOTE Should one AFCS fail during IMC flight, the flight    may    be    continued    to    destination. Should  both  AFCS  fail  during  IMC  flight,  a landing should be made as soon as practical. a. Both AFCS are operational (ALT Hold and Hea- ding not required for IMC Flight). b. Two vertical gyros and two vertical gyro indica- tors (VGI) are installed and operative. 5-7-3.  Flight in Ice. NOTE During flight in icing conditions with the EAPS installed,   the   bypass   doors   must   remain closed. Pitot tube and Advanced Flight Control Systems (AFCS) yaw port heating, and windshield anti-icing systems en- able  safe  flight  in  light-icing  conditions.  The  EAPS  is designed  to  permit  safe  flight  in  light-icing  conditions. Continuous flight in light-icing conditions below 5_C is not recommended since blade damage can occur from asymmetric ice shedding.  Intentional flight into known icing conditions with rotor blade erosion protection mate- rials  installed  is  prohibited.    Icing  conditions  include “trace,” “light,” “moderate,” and “heavy.” 5-7-4.  Thunderstorm Operation. To ensure adequate lightning strike protection, the light- ning protection cables and straps must be installed and intact on all rotor blades.  If any lightning cables or straps are missing or broken, avoid flight in or near thunder- storms, especially in areas of observed or anticipated lightning discharges.







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