AIRWORTHINESS APPROVAL FOR HUMAN EXTERNAL CARGO
(a)Hoist installations that have been certificated according to any of the following standards should be considered to satisfy the airworthiness criteria for human external cargo (HEC) operations:
(1)CS 27.865 or CS 29.865;
(2)JAR 27 Amendment 2 (27.865) or JAR 29 Amendment 2 (29.865) or later;
(3)FAR 27 Amendment 36 (27.865) or later - including compliance with CS 27.865(c)(6); or
(4)FAR 29 Amendment 43 (29.865) or later.
(b)Hoist installations that have been certified prior to the issuance of the airworthiness criteria for HEC as defined in (a) may be considered as eligible for HHO provided that following a risk assessment either:
(1)the service history of the hoist installation is found satisfactory to the competent authority; or
(2)for hoist installations with an unsatisfactory service history, additional substantiation to allow acceptance by the competent authority should be provided by the hoist installation certificate holder (type certificate (TC) or supplemental type certificate (STC)) on the basis of the following requirements:
(i)The hoist installation should withstand a force equal to a limit static load factor of 3.5, or some lower load factor, not less than 2.5, demonstrated to be the maximum load factor expected during hoist operations, multiplied by the maximum authorised external load.
(ii)The reliability of the primary and back-up quick release systems at helicopter level should be established and failure mode and effect analysis at equipment level should be available. The assessment of the design of the primary and back-up quick release systems should consider any failure that could be induced by a failure mode of any other electrical or mechanical rotorcraft system.
(iii)The operations or flight manual contains one-engine-inoperative (OEI) hover performance data and procedures for the weights, altitudes, and temperatures throughout the flight envelope for which hoist operations are accepted.
(iv)Information concerning the inspection intervals and retirement life of the hoist cable should be provided in the instructions for continued airworthiness.
(v)Any airworthiness issue reported from incidents or accidents and not addressed by (i), (ii), (iii) and (iv) should be addressed.