# AD 2013-09-08: Aircraft Fuel System

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 737-300 Series, 737-400 Series and 737-500 Series
- Effective: June 18, 2013
- Published: May 14, 2013, 78 FR 28128–28130
- Issued: April 24, 2013
- Issued as: Final rule
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- ATA chapter: 28 · Fuel
- Amendment: 39-17450
- Docket: FAA-2008-0614 (https://www.regulations.gov/docket/FAA-2008-0614)
- Project: 2007-NM-351-AD
- Registered aircraft: 42 may be affected, by airframe or engine model (OpenAirDocs)
- Official PDF: https://openairdocs.org/files/sha256/87/bd/87bdeebf60066978a45e1b5821db7bcda984653a96756c616a96e6a49d544e33 (from https://www.govinfo.gov/content/pkg/FR-2013-05-14/pdf/2013-10657.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/05/14/2013-10657/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C740CB5EF06A18BE86257B6B004AF461.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/2013-09-08

## Summary

We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 737-300, -400, and -500 series airplanes. This AD was prompted by reports of two in-service occurrences on Model 737-400 airplanes of total loss of boost pump pressure of the fuel feed system, followed by loss of fuel system suction feed capability on one engine, and in-flight shutdown of the engine. This AD requires repetitive operational tests of the engine fuel suction feed of the fuel system, and corrective actions if necessary. We are issuing this AD to detect and correct loss of the engine fuel suction feed capability of the fuel system, which, in the event of total loss of the fuel boost pumps, could result in dual engine flameout, inability to restart the engines, and consequent forced landing of the airplane.

## The airworthiness directive

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

2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD):

2013-09-08 the Boeing Company: Amendment 39-17450; Docket No. FAA-2008-0614; Directorate Identifier 2007-NM-351-AD.

### (a) Effective Date

This AD is effective June 18, 2013.

### (b) Affected ADs

None.

### (c) Applicability

This AD applies to all The Boeing Company Model 737-300, -400, and -500 series airplanes, certificated in any category.

### (d) Subject

Joint Aircraft System Component (JASC)/Air Transport Association (ATA) of America Code 2800, Aircraft Fuel System.

### (e) Unsafe Condition

This AD was prompted by reports of two in-service occurrences on Model 737-400 airplanes of total loss of boost pump pressure of the fuel feed system, followed by loss of fuel system suction feed capability on one engine, and in-flight shutdown of the engine. We are issuing this AD to detect and correct loss of the engine fuel suction feed capability of the fuel system, which in the event of total loss of the fuel boost pumps could result in dual engine flameout, inability to restart the engines, and consequent forced landing of the airplane.

### (f) Compliance

Comply with this AD within the compliance times specified, unless already done.

### (g) Operational Test and Corrective Actions

Within 7,500 flight hours or 24 months after the effective date of this AD, whichever occurs first: Perform an operational test of the engine fuel suction feed of the fuel system, and do all applicable corrective actions, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 737-28A1407, dated May 14, 2012. Do all applicable corrective actions before further flight. Repeat the operational test thereafter at intervals not to exceed 7,500 flight hours or 24 months, whichever occurs first. Thereafter, except as provided in paragraph (h) of this AD, no alternative procedures or repetitive test intervals are allowed.

### (h) Alternative Methods of Compliance (AMOCs)

  (1) The Manager, Seattle Aircraft Certification Office (ACO), 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 local Flight Standards District Office, as appropriate. If sending information directly to the manager of the ACO, send it to the attention of the person identified in the Related Information section of this AD. Information may be emailed to: 9-ANM-Seattle-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 local flight standards district office/certificate holding district office.

### (i) Related Information

For more information about this AD, contact Sue Lucier, Aerospace Engineer, Propulsion Branch, ANM-140S, Seattle Aircraft Certification Office, FAA, 1601 Lind Avenue SW., Renton, Washington 98057-3356; phone: 425-917-6438; fax: 425-917-6590; email: suzanne.lucier@faa.go v.

### (j) 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 Service Bulletin 737-28A1407, dated May 14, 2012.

    (ii) Reserved.

  (3) For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P. O. Box 3707, MC 2H-65, Seattle, WA 98124-2207; telephone 206-544-5000, extension 1; fax 206-766-5680; Internet https://www.myboeingfleet.com.

  (4) You may review copies of the referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. For information on the availability of this material at the FAA, call 425-227-1221.

  (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, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

## Rule preamble

### Dates

This AD is effective June 18, 2013.

The Director of the Federal Register approved the incorporation by reference of a certain publication listed in the AD as of June 18, 2013.

### Addresses

For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H-65, Seattle, WA 98124-2207; telephone 206-544-5000, extension 1; fax 206-766-5680; Internet https://www.myboeingfleet.com. You may review copies of the referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. For information on the availability of this material at the FAA, call 425-227-1221.

### For further information contact

Sue Lucier, Aerospace Engineer, Propulsion Branch, ANM-140S, Seattle Aircraft Certification Office, FAA, 1601 Lind Avenue SW., Renton, Washington 98057-3356; phone: 425-917-6438; fax: 425-917-6590; email: suzanne.lucier@faa.gov.

### Discussion

We issued a supplemental notice of proposed rulemaking (SNPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That SNPRM published in the Federal Register on January 30, 2013 (78 FR 6254). The original NPRM (73 FR 32258, June 6, 2008) proposed to require repetitive operational tests of the engine fuel suction feed of the fuel system, and other related testing if necessary. That SNPRM revised the NPRM by proposing to require repetitive operational tests and corrective actions if necessary.

### Comments

We gave the public the opportunity to participate in developing this AD. We received no comments on the SNPRM (78 FR 6254, January 30, 2013) or on the determination of the cost to the public.

### Conclusion

We reviewed the available data and determined that air safety and the public interest require adopting the AD as proposed.

### Costs of Compliance

We estimate that this AD affects 827 airplanes of U.S. registry. We estimate the following costs to comply with this AD:

*Estimated Costs*

| Action | Labor cost | Cost per product | Cost on U.S. operators |
| --- | --- | --- | --- |
| Operational Test | Up to 12 work-hours × $85 per hour = $1,020 per engine, per test | Up to $2,040 | Up to $1,687,080. |

We have received no definitive data that would enable us to provide a cost estimate for the 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.

We are 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

We have determined that 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) Is not a “significant rule” under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979),

  (3) Will not affect intrastate aviation in Alaska, and

  (4) 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.

### Adoption of the Amendment

Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A16WE](https://openairdocs.org/tcds/A16WE): The Boeing Company; names 3 of 17 models: 737-500 Series, 737-300 Series, 737-400 Series

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 42 (42 by airframe model, 0 by engine model)
- Makers: Boeing 42

Models with the most aircraft:

- [Boeing 737-400](https://openairdocs.org/model/boeing-737-400): 8 aircraft (airframe model)
- [Boeing 737-500](https://openairdocs.org/model/boeing-737-500): 6 aircraft (airframe model)
- [Boeing 737-436](https://openairdocs.org/model/boeing-737-436): 6 aircraft (airframe model)
- [Boeing 737-300](https://openairdocs.org/model/boeing-737-300): 4 aircraft (airframe model)
- [Boeing 737-490](https://openairdocs.org/model/boeing-737-490): 3 aircraft (airframe model)
- [Boeing 737-484](https://openairdocs.org/model/boeing-737-484): 3 aircraft (airframe model)
- [Boeing 737-524](https://openairdocs.org/model/boeing-737-524): 3 aircraft (airframe model)
- [Boeing 737-505](https://openairdocs.org/model/boeing-737-505): 2 aircraft (airframe model)
- [Boeing 737-301](https://openairdocs.org/model/boeing-737-301): 1 aircraft (airframe model)
- [Boeing 737-401](https://openairdocs.org/model/boeing-737-401): 1 aircraft (airframe model)
- [Boeing 737-306](https://openairdocs.org/model/boeing-737-306): 1 aircraft (airframe model)
- [Boeing 737-319](https://openairdocs.org/model/boeing-737-319): 1 aircraft (airframe model)
- [Boeing 737-330](https://openairdocs.org/model/boeing-737-330): 1 aircraft (airframe model)
- [Boeing 737-405](https://openairdocs.org/model/boeing-737-405): 1 aircraft (airframe model)
- [Boeing 737-528](https://openairdocs.org/model/boeing-737-528): 1 aircraft (airframe model)

All 15 models: https://openairdocs.org/ad/2013-09-08/models.md
Every aircraft: https://openairdocs.org/ad/2013-09-08/aircraft.md

## Related documents

- [Proposed rule FAA-2008-0614](https://openairdocs.org/proposed/FAA-2008-0614): Notice of proposed rulemaking (NPRM), published Jun 6, 2008
- [Proposed rule FAA-2008-0614](https://openairdocs.org/proposed/FAA-2008-0614): Supplemental notice of proposed rulemaking (NPRM); reopening of comment period, published Jan 30, 2013

Its text cites no advisory circulars or STCs.

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