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2019-25-55 THE BOEING COMPANY: ( e m e r g e n c y )
Product Identifier 2019-NM-201-AD

(a) EFFECTIVE DATE

    This Emergency Airworthiness Directive (AD) is effective upon receipt.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD  applies  to  The Boeing Company Model 737-300, -400, and -700
    series  airplanes,  certificated in any category,  modified to a Bedek
    Division Special Freighter (BDSF)  by  supplemental  type  certificate
    (STC) ST01566LA, ST01961SE, or ST02556SE, with a 9G rigid barrier.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 25, Equipment/Furnish-
    ings.

(e) UNSAFE CONDITION

    This AD was prompted  by a review of the manufacturing process for the
    9G  rigid  barrier installed  on  BDSF conversions  that  identified a
    manufacturing  non-compliance.  It  has been  found  that  the surface
    preparation before bonding was improperly done,  which can  affect the
    9G rigid barrier’s strength characteristics.  The FAA is  issuing this
    AD to address potential failure of the 9G rigid barrier under  certain
    emergency landing loads, which could injure occupants.

(f) COMPLIANCE

    Comply with this AD within the compliance times specified,  unless al-
    ready done.

(g) LOADING RESTRICTIONS AND METHODS

    Before  further  flight,  comply  with  the  loading restrictions  and
    methods  specified  in the Accomplishment Instructions of Israel Aero-
    space Industries Service Bulletin 365-00-054, dated December 2019, ex-
    cept as specified in paragraph (h) of this AD.  The  loading  restric-
    tions include reducing the cargo weights  for each  loading configura-
    tion and using additional straps as applicable.

(h) EXCEPTIONS TO SERVICE INFORMATION

(1) Where Israel Aerospace Industries  Service Bulletin 365-00-054,  dated
    December 2019, specifies using cargo restraint straps rated at a mini-
    mum of 7,500 pounds, for this AD use technical standard order TSO-C172
    cargo restraint straps;  that  TSO  specifies  a load rating  of 5,000
    pounds.

(2) The provisions for restraining cargo directly to a pallet  or the air-
    plane  as  provided  in the existing airplane flight manual  (AFM) can
    only be used if that cargo and  all cargo aft of that location are re-
    strained to a forward load factor of 9G.

(i) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

    The  Manager,  Seattle ACO 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  local  Flight Standards District Office,  as
    appropriate.  If sending information directly  to  the  manager of the
    certification  office,  send it to the attention of the person identi-
    fied in paragraph (j)(2)  of this AD.  Information  may be emailed to:
    9-ANM-Seattle-ACOAMOC-Requests@faa.gov.   Before  using  any  approved
    AMOC,  notify your appropriate principal inspector, or lacking a prin-
    cipal inspector,  the  manager  of the local flight standards district
    office/certificate holding district office.

(j) RELATED INFORMATION

(1) Refer to Mandatory Continuing Airworthiness Information (MCAI) Israeli
    AD ISR-I-53-2019-12-6 dated December 12, 2019 for related information.

(2) For further information  about this AD,  contact  Eric Lin,  Aerospace
    Engineer, Airframe Section, FAA, Seattle ACO Branch,  2200 South 216th
    St, Des Moines, WA 98198; phone and fax: 206-231-3523; email: eric.lin
    @faa.gov.

(3) For service information referenced  in this AD,  contact  Israel Aero-
    space Industries, LTD, Ben-Gurion International Airport, 70100 Israel;
    telephone  972-3-935-3090;  email  aviation_group@iai.co.il;  Internet
    https://www.iai.co.il/about/groups/aviation-group.  You may  view this
    service information at the FAA, Transport Standards Branch, 2200 South
    216th St., Des Moines, WA. For information on the availability of this
    material at the FAA, call 206-231-3195.

Issued in Des Moines, Washington, on December 13, 2019. Original signed by
Jeffrey E. Duven, Director, System Oversight Division, Aircraft Certifica-
tion Service.
PREAMBLE 

DATE: December 13, 2019
AD #: 2019-25-55

Emergency Airworthiness Directive (AD) 2019-25-55 is sent to owners and operators of The
Boeing Company Model 737-300, -400, and -700 series airplanes, certificated in any category,
modified to a Bedek Division Special Freighter (BDSF) by supplemental type certificate (STC)
ST01566LA, ST01961SE, or ST02556SE, with a 9G rigid barrier.

Background

This emergency AD was prompted by a review of the manufacturing process for the 9G rigid
barrier installed on BDSF conversions that identified a manufacturing non-compliance. It has been found that the surface preparation before bonding was improperly done, which can affect the 9G rigid barrier’s strength characteristics. This condition, if not addressed, could result in the potential failure of the 9G rigid barrier under certain emergency landing loads, which could injure occupants.

The Civil Aviation Authority of Israel (CAAI), which is the aviation authority for Israel, has
issued Israeli AD ISR-I-53-2019-12-6, dated December 12, 2019 (referred to after this as the
Mandatory Continuing Airworthiness Information, or "the MCAI"), to correct an unsafe condition for The Boeing Company Model 737-300, -400, and -700 series airplanes, modified to a BDSF by STC ST01566LA, ST01961SE, or ST02556SE, with a 9G rigid barrier.

Relevant Service Information

The FAA reviewed Israel Aerospace Industries Service Bulletin 365-00-054, dated December
2019. This service information describes loading restrictions and methods that include reducing the cargo weights for each loading configuration and using additional straps when necessary to address 9G rigid barrier manufacturing non-compliance.

FAA’s Determination

This product has been approved by the aviation authority of another country, and is approved
for operation in the United States. Pursuant to the FAA’s bilateral agreement with the State of Design Authority, the FAA has been notified of the unsafe condition described in the MCAI and service information referenced above. The FAA is issuing this AD because the agency evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. Due to the need to correct an urgent safety of flight situation, good cause exists to make this AD effective in less than 30 days.

AD Requirements

This AD requires complying with the loading restrictions and methods specified in the service
information described previously, except as discussed under "Differences Between this AD and the Service Information."

Differences Between This AD and the Service Information

Where Israel Aerospace Industries Service Bulletin 365-00-054, dated December 2019,
specifies using cargo restraint straps rated at a minimum of 7,500 pounds, this AD requires using technical standard order TSO-C172 cargo restraint straps; that TSO specifies a load rating of 5,000 pounds. This exception corrects the Israel Aerospace Industries service bulletin’s reference to a TSO-C172 cargo strap load rating of 7,500 pounds; the cargo strap load capability specified in the TSO is 5,000 pounds.

This AD specifies that the provisions for restraining cargo directly to a pallet or the airplane
as provided in the existing airplane flight manual (AFM) (reference section 1-68-XX of the Israel
Aerospace Industries Weight and Balance Manual (WBM)) can only be used if that cargo and all
cargo aft of that location are restrained to a forward load factor of 9G. This exception corrects an omission in the Israel Aerospace Industries’ service bulletin.

Interim Action

The FAA considers this AD interim action.

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.

This AD is issued in accordance with authority delegated by the Executive Director, Aircraft
Certification Service, as authorized by FAA Order 8000.51C. In accordance with that order, issuance of ADs is normally a function of the Compliance and Airworthiness Division, but during this transition period, the Executive Director has delegated the authority to issue ADs applicable to transport category airplanes and associated appliances to the Director of the System Oversight Division.

Presentation of the Actual AD

The FAA is issuing this AD under 49 U.S.C. Section 44701 according to the authority
delegated to me by the Administrator.