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Federal Register / Vol. 86, No. 247 / Wednesday, December 29, 2021 / Proposed Rules
73999

ON-CONDITION COSTS
Action
Labor cost
Replace OBV tubes, clamps, support hardware

2.25 work-hours $85 per hour = $191.25

Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs authority to issue rules on aviation safety. Subtitle I, Section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the Agencys authority.
The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701, General requirements. Under that section, Congress charges the FAA
with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce.
This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.
Regulatory Findings The FAA determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government.
For the reasons discussed above, I
certify that the proposed regulation:
1 Is not a significant regulatory action under Executive Order 12866, 2 Would not affect intrastate aviation in Alaska, and 3 Would not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

khammond on DSKJM1Z7X2PROD with PROPOSALS

List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

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PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by:
a. Removing Airworthiness Directive 20192205, Amendment 3919784 84
FR 63569, November 18, 2019; and b. Adding the following new airworthiness directive:

General Electric Company: Docket No. FAA
20211167; Project Identifier AD2021
00823E.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD action by February 14, 2022.
b Affected ADs This AD replaces AD 20192205, Amendment 3919784 84 FR 63569, November 18, 2019.
c Applicability This AD applies to General Electric Company GE CF348C1, CF348C5, CF34
8C5A1, CF348C5B1, CF348C5A2, CF34
8C5A3, CF348E2, CF348E2A1, CF348E5, CF348E5A1, CF348E5A2, CF348E6, and CF348E6A1 model turbofan engines.
d Subject Joint Aircraft System Component JASC
Code 7532, Compressor Bleed Valve.
e Unsafe Condition This AD was prompted by multiple reports of fuel leaks, some leading to engine fires, that have occurred as a result of malfunctions related to the operability bleed valve OBV.
The FAA is issuing this AD to prevent failure of the OBV. The unsafe condition, if not addressed, could result in an engine fire and damage to the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 For CF348C1, CF348C5, CF34
8C5A1, and CF348C5B1 model turbofan engines with serial numbers S/Ns: 965101
through 965670 inclusive; 194101 through 194999 inclusive; and 195101 through 195653 inclusive:
i Within 880 flight hours FHs since the previous inspection, 500 FHs after December 23, 2019 the effective date of AD 201922
05, or 6,880 FHs since new, whichever
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Parts cost $3,786.25

Cost per product $3,977.50

occurs later, inspect the OBV bleed air manifold link rod assemblies, the OBV fuel fittings, and the OBV fuel tubes.
ii Thereafter, within every 880 FHs since the previous inspection, perform additional repeat inspections of the OBV bleed air manifold link rod assemblies, the OBV fuel fittings, and the OBV fuel tubes.
iii Use the Accomplishment Instructions, paragraph 3.B., of GE CF348C Service Bulletin SB 750020 R04, dated May 10, 2019 GE SB 750020, to perform inspections required by paragraphs g1i and ii of this AD and, per the inspection criteria in paragraph 3.B., of GE SB 750020
the inspection criteria, do the following:
A Before further flight, if fuel leakage is observed at the OBV fittings or the OBV
fittings are loose, replace the OBV with a part eligible for installation.
B Before further flight, if any OBV fuel tube clamp is found to be outside the inspection criteria, re-torque the OBV fuel tube clamp or replace the OBV fuel tube clamp.
C Within 50 flight cycles FCs after the inspections required by paragraphs g1i and ii of this AD, replace any link rod hardware found to be outside the inspection criteria. Until the worn link rod hardware is replaced, the OBV fittings must be inspected before the first flight of each day for leakage and looseness in accordance with the inspection criteria. If the OBV fittings fail to meet the inspection criteria, before further flight, replace the OBV and worn link rod hardware.
2 For CF348C5B1 model turbofan engines with S/Ns not listed in paragraph g1 of this AD and for all CF348C5A2 and CF348C5A3 model turbofan engines, perform the following:
i Within 880 FHs after the effective date of this AD or prior to accumulating 6,880 FHs since new, whichever occurs later, perform an initial inspection of the OBV bleed air manifold link rod assemblies, OBV fuel fittings, and OBV fuel tubes.
ii Thereafter, within every 880 FHs since the last inspection, repeat the inspection of the OBV bleed air manifold link rod assemblies, OBV fuel fittings, and OBV fuel tubes.
iii Use the Accomplishment Instructions, paragraph 3.B., of GE SB 750020, to perform the inspections in paragraph g2i or ii of this AD and, per the inspection criteria in paragraph 3.B., of GE SB 750020, do the following:
A Before further flight, if fuel leakage is observed at the OBV fittings or the OBV
fittings are loose, replace the OBV with a part eligible for installation.
B Before further flight, if any OBV fuel tube clamp is found to be outside the inspection criteria, re-torque the OBV fuel tube clamp or replace the OBV fuel tube clamp.

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