75-05-14 KOLLSMAN INSTRUMENT COMPANY: Amendment 39-2106. Applies to Altitude Reporting Altimeters, Type Number B4545110001 and B4545110011, Serial Numbers 0001 through 0344 inclusive, except Serial Numbers 0014, 0024, 0044, 0045, 0048, 0091, 0094, 0103, 0125, 0133, 0142, 0147, 0159, 0177, 0198, 0204, 0222, 0244, 0245, 0263, 0268, 0271, 0274, 0285, 0290, 0300, 0314, 0315, 0317, 0318, 0324, 0327, 0335, through 0339, 0342, and 0343.
To prevent the possibility of altimeter failure or incorrect altitude information, accomplish the following:
(A) Within the next ten hours' time in service after the effective date of this Airworthiness Directive, unless paragraph (B) has already been complied with, install a placard on the instrument panel in clear view of the pilot which states: "Aircraft approved for day VFR Flight Only", and operate the aircraft in accordance with this limitation.
(B) Within 30 days of the effective date of this Airworthiness Directive, replace with an approved replacement part or an altimeter subject to this Airworthiness Directive which has been modified in accordance with Kollsman Instrument Company Service Bulletin No. 264, dated December 13, 1974, or any alternate means of compliance approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.
(C) Compliance with this Airworthiness Directive is not required if the aircraft has a second sensitive altimeter not subject to this Airworthiness Directive. If that second altimeter fails or is removed, compliance with paragraphs (A) and (B) is required.
This amendment is effective March 6, 1975, and was effective for all recipients of the airmail letter, dated December 19, 1974, containing this airworthiness directive.