50014 Federal Register / Vol. 88, No. 146 / Tuesday, August 1, 2023 / Rules and Regulations 

(i) Inspection of the Gap, Parts Marking 

Actions, and Replacement, With No Changes 

If, during any inspection or records review 

required by paragraph (h) of this AD, any 

oxygen valve assembly, valve or cylinder of 

an oxygen cylinder and valve assembly, or 

oxygen cylinder and valve assembly having 

an affected serial number is found: Before 

further flight, do a detailed inspection for 

correct spacing of the gap between the 

bottom of the packing retainer and top of the 

valve body, in accordance with paragraph 

3.C. of the Accomplishment Instructions of 

the applicable service information identified 

in paragraphs (h)(1) through (3) of this AD. 

(1) If the gap is found to be acceptable, as 

defined in the applicable service information 

identified in paragraphs (h)(1) through (3) of 

this AD, before further flight, do the parts 

marking actions in accordance with 

paragraph 3.D.(1) of the Accomplishment 

Instructions of the applicable service 

information identified in paragraphs (h)(1) 

through (3) of this AD. 

(2) If the gap is found to be unacceptable, 

as defined in the applicable service 

information identified in paragraphs (h)(1) 

through (3) of this AD, before further flight, 

remove the affected assembly, in accordance 

with paragraphs 3.D.(2) or 3.D.(3), as 

applicable, of the Accomplishment 

Instructions of the applicable service 

information identified in paragraphs (h)(1) 

through (3) of this AD; and replace with a 

serviceable assembly. 

(j) Reporting and Return of Parts 

(1) Report the results of the inspection 

required by paragraph (i) of this AD within 

the applicable time specified in paragraph 

(j)(1)(i) or (ii) of this AD. Report the results 

in accordance with paragraph 3.D.(1)(a) of 

the Accomplishment Instructions of the 

applicable service information identified in 

paragraphs (h)(1) through (3) of this AD. 

(i) If the inspection was done on or after 

the effective date of this AD: Submit the 

report within 30 days after the inspection. 

(ii) If the inspection was done before the 

effective date of this AD: Submit the report 

within 30 days after the effective date of this 

AD. 

(2) If, during the inspection required by 

paragraph (i) of this AD, any gap is found to 

be unacceptable, within the applicable time 

specified in paragraph (j)(2)(i) or (ii) of this 

AD, return the assembly to the manufacturer 

in accordance with paragraph 3.D.(2) or 

3.D.(3), as applicable, of the Accomplishment 

Instructions of the applicable service 

information identified in paragraphs (h)(1) 

through (3) of this AD, except you are not 

required to contact AVOX Systems Inc. for 

shipping instructions. 

(i) If the inspection was done on or after 

the effective date of this AD: Return the 

assembly within 30 days after the inspection. 

(ii) If the inspection was done before the 

effective date of this AD: Return the assembly 

within 30 days after the effective date of this 

AD. 

(k) Parts Installation Limitation 

As of the effective date of this AD, no 

AVOX Systems Inc. oxygen valve assembly, 

or valve or cylinder that is part of an oxygen 

cylinder and valve assembly, or oxygen 

cylinder and valve assembly having an 

affected serial number identified in 

Appendix 1, ‘‘Affected Shipments,’’ or 

Appendix 2, ‘‘Affected Shipments,’’ of any 

AVOX Systems Inc. service information 

identified in paragraphs (h)(1) through (3) of 

this AD may be installed on any airplane 

unless the requirements of paragraph (i) of 

this AD have been accomplished on that 

affected assembly. 

(l) Credit for Previous Actions 

(1) This paragraph provides credit for the 

actions specified in paragraphs (h) or (i) of 

this AD, if those actions were performed 

before the effective date of this AD using the 

service information specified in paragraphs 

(l)(1)(i) through (iii) of this AD. This service 

information is not incorporated by reference 

in this AD. 

(i) AVOX Systems Inc. Service Bulletin 

10015804–35–01, dated March 6, 2019; and 

AVOX Systems Inc. Alert Service Bulletin 

10015804–35–01, Revision 01, dated July 9, 

2019. 

(ii) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–02, Revision 1, dated 

September 4, 2019. 

(iii) AVOX Systems Inc. Service Bulletin 

10015804–35–03, dated April 11, 2019; and 

AVOX Systems Inc. Alert Service Bulletin 

10015804–35–03, Revision 01, dated May 21, 

2019. 

(2) This paragraph provides credit for the 

actions specified in paragraphs (h) or (i) of 

this AD, if those actions were performed 

before the effective date of this AD using the 

service information specified in paragraphs 

(l)(2)(i) through (iii) of this AD, which was 

incorporated by reference in AD 2022–04–09. 

(i) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–01, Revision 02, dated 

October 16, 2019. 

(ii) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–02, Revision 2, dated 

October 31, 2019. 

(iii) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–03, Revision 02, dated 

October 15, 2019. 

(m) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, East Certification Branch, 

FAA, has the authority to approve AMOCs 

for this AD, if requested using the procedures 

found in 14 CFR 39.19. In accordance with 

14 CFR 39.19, send your request to your 

principal inspector or responsible Flight 

Standards Office, as appropriate. If sending 

information directly to the manager of the 

East Certification Branch, send it to ATTN: 

Program Manager, Continuing Operational 

Safety, at the address identified in paragraph 

(n) of this AD or email to: 9-avs-nyaco-cos@

faa.gov. If mailing information, also submit 

information by email. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the responsible Flight Standards Office. 

(n) Related Information 

For more information about this AD, 

contact Elizabeth Dowling, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 516– 

228–7300; email 9-avs-nyaco-cos@faa.gov. 

(o) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless the AD specifies otherwise. 

(i) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–01, Revision 03, dated 

June 7, 2021. 

(ii) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–02, Revision 03, dated 

March 11, 2022. 

(iii) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–03, Revision 03, dated 

June 18, 2021. 

(3) For service information identified in 

this AD, contact AVOX Systems Inc., 225 

Erie Street, Lancaster, NY 14086; telephone 

716–683–5100; website 

safranaerosystems.com. 

(4) You may view this service information 

at the FAA, Airworthiness Products Section, 

Operational Safety Branch, 2200 South 216th 

St., Des Moines, WA. For information on the 

availability of this material at the FAA, call 

206–231–3195. 

(5) You may view this service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

email fr.inspection@nara.gov, or go to: 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued on July 7, 2023. 

Michael Linegang, 

Acting Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–16192 Filed 7–31–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2022–0458; Project 

Identifier AD–2021–00633–T; Amendment 

39–22494; AD 2023–13–09] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

Editorial Note: Editorial Note: Rule 

document 2023–15305 originally published 

on pages 46673–46677 in the issue of 

Thursday, July 20, 2023. In that publication, 

on page 46676, in the first column, in the ‘‘(c) 

Applicability’’ paragraph, the text ‘‘–300,’’ 

should have appeared. The rule is 


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Federal Register / Vol. 88, No. 146 / Tuesday, August 1, 2023 / Rules and Regulations 50015 

republished here corrected and in its 

entirety. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all The 

Boeing Company Model 767 airplanes. 

This AD was prompted by reports of 

inoperative manual and alternate 

horizontal stabilizer trim switches. This 

AD requires repetitive inspections for 

immersion of each limit switch and 

position transmitter module (LSPTM) 

and of the LSPTM electrical wiring, 

repetitive inspections for blockage of the 

drain holes and cleaning of each drain 

hole, repetitive inspections for loose or 

cracked leveling compound, and 

applicable on-condition actions. For 

certain airplanes, this AD also requires 

installing two new drain holes, 

performing repetitive inspections for 

blockage of the drain holes and cleaning 

each drain hole, and applicable oncondition actions. The FAA is issuing 

this AD to address the unsafe condition 

on these products. 

DATES: This AD is effective August 24, 

2023. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of August 24, 2023. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2022–0458; or in person at 

Docket Operations between 9 a.m. and 

5 p.m., Monday through Friday, except 

Federal holidays. The AD docket 

contains this final rule, any comments 

received, and other information. The 

address for Docket Operations is U.S. 

Department of Transportation, Docket 

Operations, M–30, West Building 

Ground Floor, Room W12–140, 1200 

New Jersey Avenue SE, Washington, DC 

20590. 

Material Incorporated by Reference: 

• For service information identified 

in this final rule, contact Boeing 

Commercial Airplanes, Attention: 

Contractual & Data Services (C&DS), 

2600 Westminster Blvd., MC 110–SK57, 

Seal Beach, CA 90740–5600; telephone 

562–797–1717; website 

myboeingfleet.com. 

• You may view this service 

information at the FAA, Airworthiness 

Products Section, Operational Safety 

Branch, 2200 South 216th St., Des 

Moines, WA. For information on the 

availability of this material at the FAA, 

call 206–231–3195. It is also available at 

regulations.gov under Docket No. FAA– 

2022–0458. 

FOR FURTHER INFORMATION CONTACT: 

Doug Tsuji, Aviation Safety Engineer, 

FAA, 2200 South 216th St., Des Moines, 

WA 98198; phone: 206–231–3548; 

email: Douglas.Tsuji@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to all The Boeing Company Model 

767 airplanes. The NPRM published in 

the Federal Register on April 25, 2022 

(87 FR 24276). The NPRM was 

prompted by reports of inoperative 

manual and alternate horizontal 

stabilizer trim switches, as a result of 

blocked drain holes in the area aft of 

body station (STA) 1725.5, which 

caused water to accumulate and 

eventually submerge the three LSPTMs, 

affecting their function. In the NPRM, 

the FAA proposed to require repetitive 

inspections for immersion of each 

LSPTM and of the LSPTM electrical 

wiring, repetitive inspections for 

blockage of the drain holes and cleaning 

of each drain hole, repetitive 

inspections for loose or cracked leveling 

compound, and applicable on-condition 

actions. For certain airplanes, the FAA 

proposed to also require installing two 

new drain holes, performing repetitive 

inspections for blockage of the drain 

holes and cleaning each drain hole, and 

applicable on-condition actions. The 

FAA is issuing this AD to address 

collected water or ice that could damage 

the LSPTMs and cause stabilizer trim 

position sensors to generate corrupt or 

erroneous signals to the flight crew. 

This condition, if not addressed, could 

result in misleading or confusing flight 

deck indications, a high speed overrun 

during takeoff, or a low altitude stall 

immediately after takeoff. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received comments from 

The Air Line Pilots Association, 

International (ALPA), United Airlines, 

and an individual who supported the 

NPRM without change. 

The FAA received additional 

comments from four commenters, 

including UPS, FedEx, Delta Air Lines 

(Delta), and Aviation Partners Boeing 

(APB). The following presents the 

comments received on the NPRM and 

the FAA’s response to each comment. 

Effect of Winglets on Accomplishment 

of the Proposed Actions 

APB stated that the installation of 

winglets per Supplemental Type 

Certificate (STC) ST01920SE does not 

affect the accomplishment of the 

manufacturer’s service instructions. 

The FAA agrees with the commenter 

that STC ST01920SE does not affect the 

accomplishment of the manufacturer’s 

service instructions. Therefore, the 

installation of STC ST01920SE does not 

affect the ability to accomplish the 

actions required by this AD. The FAA 

has not changed this AD in this regard. 

Request To Revise Inspection Interval 

FedEx requested that the repetitive 

interval for the inspections specified in 

Boeing Alert Requirements Bulletin 

767–27A0240 RB, dated January 19, 

2021, be revised from 90 days to 225 

days. FedEx noted that, in anticipation 

of an AD, it had begun inspecting all 

Model 767–300F aircraft at 90 day 

intervals, but could not maintain that 

schedule, and even a 120 day inspection 

interval was challenging to comply 

with. FedEx added that, during those 

initial inspections, it found only one 

aircraft with a clogged drain hole and no 

evidence of water pooling, damaged 

leveling compound, or damaged 

LSPTMs in its fleet. Based on those 

findings, FedEx stated that it had 

revised its inspection intervals to 450 

flight cycles (the equivalent of 225 

days). FedEx noted that if the FAA 

mandates a 90 day repetitive interval, it 

will be forced to ground aircraft. FedEx 

concluded that a 225 day inspection 

interval would eliminate undue burden 

on operators while maintaining an 

acceptable level of safety. 

The FAA partially agrees with the 

commenter’s request. Based on the 

FAA’s risk assessment, the FAA has 

determined that a 225 day interval, 

which equates to approximately 3 

inspections during the 24 month 

interval before the new drain holes must 

be added, is not adequate to address the 

unsafe condition because the 

inspections would not be frequent 

enough. However, the FAA has 

determined that extending the interval 

to 150 days, which equates to 

approximately 5 inspections during the 

24 month interval before the new drain 

holes must be added, provides an 

adequate level of safety. The FAA has 

added paragraph (h)(4) of this AD to 

specify the 150 day inspection interval. 

Request To Clarify Exception Language 

Delta requested that paragraph (h)(3) 

of the proposed AD be revised to clarify 

the intent. Delta claimed the wording is 

very confusing and initially lead it to 

believe that both service bulletins, 

Boeing Alert Requirements Bulletin 

767–27A0243 RB, dated May 28, 2021, 

and Boeing Alert Requirements Bulletin 

767–27A0240 RB, dated January 19, 

2021, must be accomplished in 90 days. 

Delta added that it understands the 

intent of paragraph (h)(3) of the 

proposed AD is to address a discrepancy 

where Boeing Alert Requirements 


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50016 Federal Register / Vol. 88, No. 146 / Tuesday, August 1, 2023 / Rules and Regulations 

Bulletin 767–27A0243 RB, dated May 

28, 2021, Action 1, gives a compliance 

time of 24 months to do Boeing Alert 

Requirements Bulletin 767–27A0240 

RB, dated January 19, 2021, which in 

turn has an initial compliance time of 

90 days. Delta suggested that paragraph 

(h)(3) could be clarified to specify the 

compliance times for each referenced 

bulletin. 

The FAA agrees with the commenter’s 

request. The FAA has revised paragraph 

(h)(3) of this AD to clarify that although 

Action 1 in Boeing Alert Requirements 

Bulletin 767–27A0243 RB, dated May 

28, 2021, specifies to accomplish the 

actions in Boeing Alert Requirements 

Bulletin 767–27A0240 RB, dated 

January 19, 2021, within 24 months 

after the date of issuance of the original 

airworthiness certificate or original 

export certificate of airworthiness, or 

within 24 months after the original issue 

date of Boeing Alert Requirements 

Bulletin 767–27A0243 RB, whichever 

occurs later; Boeing Alert Requirements 

Bulletin 767–27A0240 RB, dated 

January 19, 2021, contains the 

applicable compliance times for 

accomplishing the actions specified in 

Action1. The applicable compliance 

times for all other actions in Boeing 

Alert Requirements Bulletin 767– 

27A0243 RB, dated May 28, 2021, is at 

the times specified in Boeing Alert 

Requirements Bulletin 767–27A0243 

RB, dated May 28, 2021, except as 

specified in paragraph (h)(1) of this AD. 

Request To Delay AD Issuance Until 

Parts Are Available 

FedEx requested that the FAA delay 

issuance of a final rule until parts are 

available from Boeing. FedEx noted that 

it is planning to modify its aircraft as 

soon as possible, which would allow it 

to stop the repetitive inspections. 

However, FedEx stated that it has been 

trying unsuccessfully to order the 

necessary parts from Boeing since 

August, 2021. FedEx added that it was 

told the delivery schedule was ‘‘to be 

determined,’’ causing it to miss many 

scheduled aircraft checks. 

The FAA disagrees with the 

commenter’s request. The FAA notes 

that this AD requires repetitive 

inspections until the terminating 

modification is accomplished, so 

delaying issuance of this AD would also 

delay those vital inspections. 

Additionally, the FAA has confirmed 

with the manufacturer that adequate 

parts will be available to comply with 

this AD in the required compliance 

time. This AD has not been changed 

regarding this issue. 

Request To Revise Certain Notes 

FedEx requested that the FAA revise 

Note 1 to paragraph (g)(1) and Note 2 to 

paragraph (g)(2). FedEx requested 

revised wording to ensure that the new 

AD would not require the service 

information referenced in those notes. 

The FAA agrees to clarify. The 

wording in the notes is intended to 

inform operators that the service 

information specified contains 

additional guidance for accomplishing 

the required actions. The service 

information referenced in the notes is 

not mandated by this AD, and operators 

are not required to use it. This AD has 

not been changed regarding this issue. 

Request To Allow Skipping Close 

Access in Certain Situations 

Delta requested that the proposed AD 

be revised to allow operators to skip 

certain close access steps. Delta stated 

that certain conditions in Boeing Alert 

Requirements Bulletin 767–27A0240 

RB, dated January 19, 2021; and Boeing 

Alert Requirements Bulletin 767– 

27A0243 RB, dated May 28, 2021, 

include reference to close access or 

open access steps. Delta added that, 

based on how an operator would 

perform the steps, it doesn’t make sense 

to close access when finishing the 

actions in one table, only to have to 

open access to begin work on the 

actions in the next table. Delta noted 

that some close access steps in Boeing 

Alert Requirements Bulletin 767– 

27A0240 RB, dated January 19, 2021, 

include a flagnote allowing operators to 

skip the close access steps if additional 

work is required. Delta concluded that 

the flagnote should have been included 

for close access steps throughout Boeing 

Alert Requirements Bulletin 767– 

27A0240 RB, dated January 19, 2021; 

and Boeing Alert Requirements Bulletin 

767–27A0243 RB, dated May 28, 2021. 

The FAA agrees to clarify. The close 

access steps are not listed in the 

‘‘Action’’ or ‘‘Method of Compliance’’ 

columns in the referenced service 

information. Instead, the close access 

steps are in a ‘‘Refer to’’ column, which 

is for reference only; the procedures 

within that column are not required by 

this AD and are for guidance only. 

Therefore, operators may deviate from 

those steps using accepted procedures. 

Acceptable deviations include not 

performing close access steps until all 

applicable actions are completed. This 

AD has not been changed regarding this 

issue. 

Request To Not Require Certain Actions 

UPS requested that the proposed AD 

be revised to not require the actions 

specified in paragraph (g)(2) of the 

proposed AD. UPS stated that it 

understands that accomplishment of the 

repetitive inspections at the shorter 

interval specified in Boeing Alert 

Requirements Bulletin 767–27A0240 

RB, dated January 19, 2021, is an 

acceptable means to detect and prevent 

the accumulation of water and ice in the 

area of the LSPTMs. UPS suggested that 

these frequent inspections provide an 

equivalent level of safety as adding new 

drain holes and inspections with a 

longer inspection interval. Therefore, 

UPS requested that the actions in 

paragraph (g)(2) of the proposed AD be 

made optional and terminate the actions 

in paragraph (g)(1) of the proposed AD 

if accomplished. 

The FAA disagrees with the 

commenter’s request. The addition of 

the two drain holes will create a 

configuration where multiple unique 

blockage events must occur before the 

accumulation of water or ice can 

happen. The FAA has therefore 

determined that the addition of drain 

holes, combined with the repetitive 

inspections, cleaning, and on-condition 

actions, is the best method to address 

the unsafe condition. However, under 

the provisions specified in paragraph (i) 

of this AD, the FAA will consider 

requests for alternative methods of 

compliance (AMOCs). This AD has not 

been changed regarding this issue. 

Conclusion 

The FAA reviewed the relevant data, 

considered any comments received, and 

determined that air safety requires 

adopting this AD as proposed. 

Accordingly, the FAA is issuing this AD 

to address the unsafe condition on these 

products. Except for minor editorial 

changes, and any other changes 

described previously, this AD is 

adopted as proposed in the NPRM. 

None of the changes will increase the 

economic burden on any operator. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Boeing Alert 

Requirements Bulletin 767–27A0240 

RB, dated January 19, 2021, which 

specifies procedures for repetitive 

general visual inspections (GVIs) for 

immersion in water or ice of each 

LSPTM and of the LSPTM electrical 

wiring, repetitive GVIs for blockage of 

the three drain holes and cleaning of 

each drain hole, repetitive GVIs for 

loose or cracked leveling compound, 

and applicable on-condition actions. 

On-condition actions include removing 

any water or ice, doing a detailed 

inspection for damage (corrosion or 

water damage) of any immersed LSPTM 


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Federal Register / Vol. 88, No. 146 / Tuesday, August 1, 2023 / Rules and Regulations 50017 

or LSPTM electrical wiring, installing a 

serviceable LSPTM, repairing or 

replacing any damaged LSPTM 

electrical wiring, clearing any drain hole 

blockages, and repairing any loose or 

cracked leveling compound. 

The FAA also reviewed Boeing Alert 

Requirements Bulletin 767–27A0243 

RB, dated May 28, 2021. This service 

information specifies procedures for 

installing two new drain holes, 

performing repetitive GVIs for blockage 

of the five drain holes and cleaning each 

drain hole, and applicable on-condition 

actions. On-condition actions include 

clearing any drain hole blockages. 

This service information is reasonably 

available because the interested parties 

have access to it through their normal 

course of business or by the means 

identified in ADDRESSES. 

Costs of Compliance 

The FAA estimates that this AD 

affects 613 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Drill drain holes ......................................... 5 work-hours × $85 per hour = $425 ...... $2,770 $3,195 .................... Up to $1,958,535. 

Repetitive GVI and cleaning of 5 drain 

holes.

2 work-hours × $85 per hour = $170 per 

inspection cycle.

0 $170 per inspection 

cycle.

Up to $104,210 per 

inspection cycle. 

Repetitive GVI of LSPTM ......................... 1 work-hour × $85 per hour = $85 per inspection cycle.0 $85 per inspection 

cycle.

$52,105 per inspection cycle. 

Repetitive GVI of LSPTM electrical wiring 1 work-hour × $85 per hour = $85 per inspection cycle.0 $85 per inspection 

cycle.

$52,105 per inspection cycle. 

Repetitive GVI and cleaning of 3 drain 

holes.

1 work-hour × $85 per hour = $85 per inspection cycle.0 $85 per inspection 

cycle.

$52,105 per inspection cycle. 

Repetitive GVI of leveling compound ....... 1 work-hour × $85 per hour = $85 per inspection cycle.0 $85 per inspection 

cycle.

$52,105 per inspection cycle. 

The FAA estimates the following 

costs to do any necessary inspections 

that would be required based on the 

results of the inspection. The agency has 

no way of determining the number of 

aircraft that might need these 

inspections: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Detailed inspection of LSPTM or LSPTM electrical 

wiring.

1 work-hour × $85 per hour = $85 ............................... $0 $85 

The FAA has received no definitive 

data on which to base the cost estimates 

for the other on-condition actions 

specified in this AD. 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s 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 Agency’s 

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 

This AD will not have federalism 

implications under Executive Order 

13132. This AD will 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 this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Will not affect intrastate aviation 

in Alaska, and 

(3) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 14 CFR part 39 as 

follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

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

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive: 

2023–13–09 The Boeing Company: 

Amendment 39–22494; Docket No. 

FAA–2022–0458; Project Identifier AD– 

2021–00633–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective August 24, 2023. 

(b) Affected ADs 

None. 


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50018 Federal Register / Vol. 88, No. 146 / Tuesday, August 1, 2023 / Rules and Regulations 

(c) Applicability 

This AD applies to all The Boeing 

Company Model 767–200, –300, –300F, 

–400ER, and –2C series airplanes, certificated 

in any category. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 27, Flight controls; 

(e) Unsafe Condition 

This AD was prompted by reports of 

inoperative manual and alternate horizontal 

stabilizer trim switches; an investigation 

found that certain drain holes were blocked, 

causing water and ice to collect and 

subsequently cover the limit switch and 

position transmitter modules (LSPTMs), 

which affected their function. The FAA is 

issuing this AD to address collected water or 

ice that could damage the LSPTMs and cause 

stabilizer trim position sensors to generate 

corrupt or erroneous signals to the flight 

crew. This condition, if not addressed, could 

result in misleading or confusing flight deck 

indications, a high speed overrun during 

takeoff, or a low altitude stall immediately 

after takeoff. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) For all Model 767–200, –300, –300F, 

and –400ER airplanes: Except as specified by 

paragraph (h) of this AD, at the applicable 

times specified in the ‘‘Compliance’’ 

paragraph of Boeing Alert Requirements 

Bulletin 767–27A0240 RB, dated January 19, 

2021, do all applicable actions identified in, 

and in accordance with, the Accomplishment 

Instructions of Boeing Alert Requirements 

Bulletin 767–27A0240 RB, dated January 19, 

2021. 

Note 1 to paragraph (g)(1): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Alert Service 

Bulletin 767–27A0240, dated January 19, 

2021, which is referred to in Boeing Alert 

Requirements Bulletin 767–27A0240 RB, 

dated January 19, 2021. 

(2) For Model 767–200, –300, –300F, and 

–400ER airplanes, as identified in Boeing 

Alert Requirements Bulletin 767–27A0243 

RB, dated May 28, 2021: Except as specified 

by paragraph (h) of this AD, at the applicable 

times specified in the ‘‘Compliance’’ 

paragraph of Boeing Alert Requirements 

Bulletin 767–27A0243 RB, dated May 28, 

2021, do all applicable actions identified in, 

and in accordance with, the Accomplishment 

Instructions of Boeing Alert Requirements 

Bulletin 767–27A0243 RB, dated May 28, 

2021. Accomplishing the installation of two 

new drain holes required by this paragraph 

terminates the repetitive inspections of the 

drain holes required by paragraph (g)(1) of 

this AD. 

Note 2 to paragraph (g)(2): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Alert Service 

Bulletin 767–27A0243, dated May 28, 2021, 

which is referred to in Boeing Alert 

Requirements Bulletin 767–27A0243 RB, 

dated May 28, 2021. 

(3) For Model 767–2C airplanes: Within 90 

days after the effective date of this AD, 

inspect the LSPTMs, LSPTM electrical 

wiring, drain holes, and leveling compound; 

install two new drain holes as applicable; 

and do applicable on-condition actions in 

accordance with a method approved by the 

Manager, AIR–520 Continued Operational 

Safety Branch, FAA. 

(h) Exceptions to Service Information 

Specifications 

(1) Where Boeing Alert Requirements 

Bulletin 767–27A0243 RB, dated May 28, 

2021, uses the phrase ‘‘the original issue date 

of the Requirements Bulletin 767–27A0243 

RB,’’ this AD requires using ‘‘the effective 

date of this AD.’’ 

(2) Where Boeing Alert Requirements 

Bulletin 767–27A0240 RB, dated January 19, 

2021, uses the phrase ‘‘the original issue date 

of the Requirements Bulletin 767–27A0240 

RB,’’ this AD requires using ‘‘the effective 

date of this AD.’’ 

(3) Where Boeing Alert Requirements 

Bulletin 767–27A0243 RB, dated May 28, 

2021, specifies a compliance time for Action 

1 (accomplishment of Boeing Alert 

Requirements Bulletin 767–27A0240 RB, 

dated January 19, 2021), for this AD the 

compliance times for accomplishing the 

actions in Boeing Alert Requirements 

Bulletin 767–27A0240 RB, dated January 19, 

2021, are as specified in paragraph (g)(1) of 

this AD. 

(4) Where the ‘‘Repeat Interval (Not to 

Exceed)’’ column of the Compliance tables in 

Boeing Alert Requirements Bulletin 767– 

27A0240 RB, dated January 19, 2021, 

specifies ‘‘90 days,’’ this AD requires using 

‘‘150 days.’’ 

(i) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, AIR–520 Continued 

Operational Safety Branch, FAA, has the 

authority to approve AMOCs for this AD, if 

requested using the procedures found in 14 

CFR 39.19. In accordance with 14 CFR 39.19, 

send your request to your principal inspector 

or responsible Flight Standards Office, as 

appropriate. If sending information directly 

to the manager of the certification office, 

send it to the attention of the person 

identified in paragraph (j)(1) of this AD. 

Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the responsible Flight Standards Office. 

(3) An AMOC that provides an acceptable 

level of safety may be used for any repair, 

modification, or alteration required by this 

AD if it is approved by The Boeing Company 

Organization Designation Authorization 

(ODA) that has been authorized by the 

Manager, AIR–520 Continued Operational 

Safety Branch, FAA, to make those findings. 

To be approved, the repair method, 

modification deviation, or alteration 

deviation must meet the certification basis of 

the airplane, and the approval must 

specifically refer to this AD. 

(j) Additional Information 

(1) For more information about this AD, 

contact Doug Tsuji, Aviation Safety Engineer, 

FAA, 2200 South 216th St., Des Moines, WA 

98198; phone: 206–231–3548; email: 

Douglas.Tsuji@faa.gov. 

(2) Service information identified in this 

AD that is not incorporated by reference is 

available at the addresses specified in 

paragraphs (k)(3) and (4) of this AD. 

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless the AD specifies otherwise. 

(i) Boeing Alert Requirements Bulletin 

767–27A0240 RB, dated January 19, 2021. 

(ii) Boeing Alert Requirements Bulletin 

767–27A0243 RB, dated May 28, 2021. 

(3) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Contractual & Data 

Services (C&DS), 2600 Westminster Blvd., 

MC 110–SK57, Seal Beach, CA 90740–5600; 

telephone 562–797–1717; website 

myboeingfleet.com. 

(4) You may view this service information 

at the FAA, Airworthiness Products Section, 

Operational Safety Branch, 2200 South 216th 

St., Des Moines, WA. For information on the 

availability of this material at the FAA, call 

206–231–3195. 

(5) You may view this service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

fr.inspection@nara.gov, or go to: 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued on June 28, 2023. 

Michael Linegang, 

Acting Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. R1–2023–15305 Filed 7–31–23; 8:45 am] 

BILLING CODE 0099–10–D 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2022–0245; Airspace 

Docket No. 19–AAL–49] 

RIN 2120–AA66 

Establishment of United States Area 

Navigation (RNAV) Route T–380; 

Emmonak, AK 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: This action establishes United 

States Area Navigation (RNAV) T-route, 


lotter on DSK11XQN23PROD with RULES1