Department of the Interior

External loads shall only be transported in accordance with the FAA-approved flight manual supplement or 14 CFR 21. C. Airplane Single Engine Night Operations. DOI Owned or Operated. (1) Flight at night (as defined in 14 CFR 1) in single engine airplanes shall be in an airplane equipped for IFR flight in accordance with 14 CFR 91, Subpart B. ................
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