AIRWORTHINESS
DIRECTIVE
CAA-AD-074/2002
Date of issue: July 10, 2002
APPLIANCE - INERTIAL REFERENCE UNIT -
INSPECTION/REPLACEMENT
Applicability: any aircraft, certificated in any category, that
incorporates one of the following:
(1) Inertial Reference Unit (IRU) part number (P/N) HG1075AB05, any serial
number (last four digits) 0644 through 0723 (excluding 0652 and 0659), that
incorporates modification status 3. This AD does not apply to these units if
they incorporate modification status 7; or
(2) IRU P/N HG1075GB05, any serial number (last four digits) 0652 or 0659, that
incorporates modification status 2. This AD does not apply to these units if
they incorporate modification status 6.
Effective date: August 09, 2002
Compliance: Required as indicated in FAA AD 2002-13-07.
Remarks: The compliance of this AD must be recorded
in Aircraft Logbook, where applicable the requirements of this AD must be
integrated into Aircraft Technical Documentation. Address inquiries concerning
this AD to: Civil Aviation Authority, Airworthiness Division, Ruzyne Airport,
160 08 Prague 6, Czech Republic, tel.: 420 2 33320922, fax: 420 2 20562270.
Ing. Pavel MATOUŠEK
Director of Airworthiness Division
CAA CZ
2002-13-07 Honeywell,
Inc.: Amendment
39-12795; Docket No. 2001-CE- 28-AD.
(a) What aircraft are affected by this AD? This AD affects any aircraft,
certificated in any category, that incorporates one of the following:
(1) Inertial Reference Unit (IRU) part number (P/N) HG1075AB05, any serial
number (last four digits) 0644 through 0723 (excluding 0652 and 0659), that
incorporates modification status 3. This AD does not apply to these units if
they incorporate modification status 7; or
(2) IRU P/N HG1075GB05, any serial number (last four digits) 0652 or 0659, that
incorporates modification status 2. This AD does not apply to these units if
they incorporate modification status 6.
Note 1: These IRUs are primarily used on early manufactured Dassault
Falcon Jets, but could be incorporated on other aircraft through the technical
standard order (TSO) or supplemental type certificate (STC).
(b) Who must comply with this AD? Anyone who wishes to operate an
aircraft with any of the equipment identified in paragraph (a) of this AD
installed must comply with this AD.
(c) What problem does this AD address? The actions specified by this AD
are intended to ensure the correct transition of the IRU to battery power upon
the loss of primary power. Failure of an IRU to transition to backup battery
power could result in loss of attitude, heading, and position reference and
lead to the pilot making flight decisions that put the aircraft in unsafe
flight conditions.
(d) What actions must I accomplish to address this problem? To address
this problem, you must accomplish the following:
|
Actions |
Compliance |
Procedures |
|
(1)
Inspect any affected IRU for proper function |
Within
the next 50 hours time-in-service (TIS) after August 9, 2002 (the effective
date of this AD). |
In
accordance with the instructions in Honeywell Alert Service Bulletin
HG1075AB-34-A0013, dated May 21, 2001; or Honeywell Alert Service Bulletin
HG1075GB-34-A0005, dated May 21, 2001, as applicable. |
|
(2)
Remove any affected IRU from the airplane. |
If found
to not function properly during the inspection required by paragraph (d)(1)
of this AD, remove prior to further flight after the inspection. If found to
function properly, remove within 200 hours time-in-service (TIS) after the
inspection required by paragraph (d)(1) of this AD. |
In
accordance with the instructions in Honeywell Alert Service Bulletin
HG1075AB-34-A0013, dated May 21, 2001; or Honeywell Alert Service Bulletin
HG1075GB-34-A0005, dated May 21, 2001, as applicable. |
|
(3) Do not
install, on any aircraft, one of the IRU's identified in paragraphs (a)(1)
and (a)(2) of this AD, unless it has been modified at Honeywell, Inc. and
updated to one of the following: |
As of
August 9, 2002 (the effective date of this AD). |
Not
Applicable. |
(e) Can I comply with this AD in any other way? You may use an
alternative method of compliance or adjust the compliance time if:
(1) Your alternative method of compliance provides an equivalent level of
safety; and
(2) The Manager, Chicago Aircraft Certification Office (ACO), approves your
alternative. Submit your request through an FAA Principal Maintenance
Inspector, who may add comments and then send it to the Manager, Chicago ACO.
Note 2: This AD applies to each airplane identified in paragraph (a) of
this AD, regardless of whether it has been modified, altered, or repaired in
the area subject to the requirements of this AD. For airplanes that have been
modified, altered, or repaired so that the performance of the requirements of
this AD is affected, the owner/ operator must request approval for an
alternative method of compliance in accordance with paragraph (e) of this AD. The
request should include an assessment of the effect of the modification,
alteration, or repair on the unsafe condition addressed by this AD; and, if you
have not eliminated the unsafe condition, specific actions you propose to
address it.
(f) Where can I get information about any already-approved alternative
methods of compliance? Contact Wesley Rouse, Aerospace Engineer, FAA,
Chicago Aircraft Certification Office, 2300 E. Devon Avenue, Des Plaines,
Illinois 60018; telephone: (847) 294-8113; facsimile: (847) 294-7834.
(g) What if I need to fly the airplane to another location to comply with
this AD? The FAA can issue a special flight permit under sections 21.197
and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to
operate your airplane to a location where you can accomplish the requirements
of this AD.
(h) Are any service bulletins incorporated into this AD by reference?
Actions required by this AD must be done in accordance with Honeywell Alert
Service Bulletin HG1075AB-34-A0013, dated May 21, 2001 or Honeywell Alert
Service Bulletin HG1075GB-34-A0005, dated May 21, 2001, as applicable. The
Director of the Federal Register approved this incorporation by reference under
5 U.S.C. 552(a) and 1 CFR part 51. You may get copies from Honeywell, Inc.,
Customer Response Center at 1-877-436-2005. You may view copies at the FAA,
Central Region, Office of the Regional Counsel, 901 Locust, Room 506, Kansas
City, Missouri, or at the Office of the Federal Register, 800 North Capitol
Street, NW, suite 700, Washington, DC.
(i) When does this amendment become effective? This amendment becomes
effective on August 9, 2002.