Document ID: chunk:federal_register_of_legislation:F2024C00332:reg:9:p5
Version: federal_register_of_legislation:F2024C00332
Segment Type: reg
Provision Reference: reg 9 (pt 5/5)
Character Range: 253270–255678

who acquired it as the first or later acquirer in a line of direct and provable acquisitions originating from the initial acquirer (a subsequent acquirer); and
Note 1 In this subsection, "acquired (with or without valuable consideration)" refers to, for example, an acquisition through a purchase or a donation or in any other way.
Note 2 CASA considers the source of second-hand NVG tubes and equipment to be a matter that may affect safety.
 (d) in the case of replacement of NVG image intensifier tubes with tubes that are sourced from other than an official source — as follows:
 (i) replaced as a pair;
 (ii) of the same form, fit and function as the tubes being replaced;
 (iii) such that the replacement does not to involve modification of the NVIS mounting frame or optical components;
 (iv) compliant with paragraph (1)(a).
Note For guidance only, US AN/AVS 9 NVIS, although manufactured by different manufacturers, are produced to the same US Department of Defense specification and, therefore, these tubes are interchangeable.
 (3) If 2 or more NVIS pilots on an NVIS flight use dissimilar NVG image intensifier tubes and equipment, the pilot in command must use the highest level of NVIS tubes and equipment in terms of resolution, gain and acuity.
Note Use of dissimilar NVIS does not remove the requirement that the minimum standard of any set used must be in accordance with subsections (1) and (2).
 (4) An NVIS pilot who occupies a control seat of a rotorcraft during an NVIS operation must use the NVIS manufacturer's approved helmet mounted attachment device for the NVIS.
 (5) For paragraph (1)(a), column 3 of each item of Table 11.62(5)(a) shows how a relevant operational performance specification in the paragraph of RTCA/DO‑275 mentioned in column 1 of the item, and summarised (if any) in column 2 of the item, is modified.

Table 11.62(5)—Modifications of RTCA/DO 275
                                             Column 1                                                    Column 2                                                                                     Column 3
Item                                         RTCA/DO-275                                                 Summary                                                                                      Amended performance requirement
                                             (as in force from time to time)