# AD 93-14-12: Crewmember Protective Breathing Equipment Units

- Type: Airworthiness directive
- Status: Current
- Products: Airbus A300 B2-1A, A300 B2-1C, A300 B2-203, A300 B2K-3C, A300 B4-103, A300 B4-203, A300 B4-2C, A300 B4-601, A300 B4-603, A300 B4-605R, A300 B4-620, A300 B4-622R and 192 more
- Effective: September 2, 1993
- Superseded by: Nothing supersedes this AD
- Product type: Appliance
- Amendment: 39-8636
- Docket: 92-ANE-14
- Registered aircraft: 1,089 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C026A14BA37FD21986256A40006D19EF.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/93-14-12

## The airworthiness directive

93-14-12 ESSEX PB&R CORPORATION (formerly E.I. DuPont de Nemours and Company Incorporated): Amendment 39-8636. Docket No. 92-ANE-14.

Applicability: Essex PB&R Corporation (formerly E.I. DuPont de Nemours and Company Incorporated) PELS Model 4566M37B crewmember protective breathing equipment (PBE) units, as listed in Essex PB&R Corporation Service Bulletin (SB) No. 001, Revision 1, dated October 3, 1991, installed on but not limited to transport category aircraft manufactured by Boeing, McDonnell Douglas, Airbus, and Lockheed.

Compliance: Required as indicated, unless accomplished previously.

To prevent leakage of the PBE neck seal, which could compromise the crew's ability to combat an aircraft fire, accomplish the following:

  (a) Within the next 15 months after the effective date of this AD, remove the affected PBE unit, in accordance with the accomplishment instructions of Essex PB&R Corporation Service Bulletin (SB) No. 001, Revision 1, dated October 3, 1991, and replace with a serviceable unit.

  (b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, New York Aircraft Certification Office. The request should be forwarded through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, New York Aircraft Certification Office. NOTE: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from New York Aircraft Certification Office.

  (c) Special flight permits may be issued, in accordance with FAR 21.197 and 21.199, to operate the aircraft to a location where the requirements of this AD can be accomplished.

  (d) The modification shall be done in accordance with Essex PB&R Corporation Service Bulletin (SB) No. 001, Revision 1, dated October 3, 1991. This incorporation by reference was approved by the Director of the Federal Register, in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Essex PB&R Corp., P.O. Box 791, 505 Blue Ball Road, Elkton, MD 21921. Copies may be inspected at the FAA, New England Region, Office of the Assistant Chief Counsel, 12 New England Executive Park, Burlington, MA 01803-5299; or at the Office of the Federal Register, 800 North Capitol Street NW., suite 700, Washington, DC.

  (e) This amendment becomes effective on September 2, 1993.

## Affected data sheets (46) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 4A25](https://openairdocs.org/tcds/4A25): The Boeing Company; names 27 of 27 models: DC-8-41, DC-8-52, DC-8-61, DC-8-53, DC-8-51, DC-8-63, DC-8-11, DC-8-72F…
- [TCDS A6WE](https://openairdocs.org/tcds/A6WE): The Boeing Company; names 20 of 25 models: DC-9-12, DC-9-15F, MD-88, DC-9-41, DC-9-13, DC-9-34F, DC-9-81 (MD-81), DC-9-33F…
- [TCDS A20WE](https://openairdocs.org/tcds/A20WE): The Boeing Company; names 11 of 14 models: 747-100B Series, 747SP Series, 747-400D Series, 747-200B Series, 747-200F Series, 747-300 Series, 747-200C Series, 747-100B SUD Series…
- [TCDS A22WE](https://openairdocs.org/tcds/A22WE): The Boeing Company; names 11 of 11 models: DC-10-40, MD-11, MD-10-30F, DC-10-10F, DC-10-30, DC-10-30F (KC-10A KDC-10), DC-10-10, MD-10-10F…
- [TCDS A35EU](https://openairdocs.org/tcds/A35EU): Airbus SAS; names 11 of 17 models: A310-203, A300 B4-622R, A300 B4-601, A310-221, A300 B4-603, A310-324, A300 B4-620, A310-322…
- [TCDS A-669](https://openairdocs.org/tcds/A-669): The Boeing Company; names 10 of 10 models: DC3C-S4C4G, DC3C-R-1830-90C, DC3A-S1C3G, DC3C-SC3G, DC3C-S1C3G, DC3A-SCG, DC3A-SC3G, DC3A-S1CG…
- [TCDS 6A5](https://openairdocs.org/tcds/6A5): Lockheed Martin Aeronautics Company; names 8 of 8 models: 1049G-82, 1049C-55, 1049E-55, 1049F-55 (USAF C-121C), 1049D-55, 1049B-55 (Navy R7V-1), 1049H-82, 1049-54
- [TCDS A-762](https://openairdocs.org/tcds/A-762): The Boeing Company; names 7 of 7 models: C54E-DC, C54G-DC, C54B-DC, DC-4, C54A-DC, C54D-DC, C54-DC
- [TCDS A-763](https://openairdocs.org/tcds/A-763): Lockheed Martin Aeronautics Company; names 6 of 6 models: 149-46, 649-79, 749A-79, 749-79, 649A-79, 49-46
- [TCDS A16WE](https://openairdocs.org/tcds/A16WE): The Boeing Company; names 6 of 17 models: 737-500 Series, 737-100 Series, 737-200C Series, 737-300 Series, 737-200 Series, 737-400 Series
- [TCDS A3WE](https://openairdocs.org/tcds/A3WE): The Boeing Company; names 6 of 6 models: 727-100 Series, 727 Series, 727-200 Series, 727-100C Series, 727-200F Series, 727C Series
- [TCDS 4A21](https://openairdocs.org/tcds/4A21): The Boeing Company; names 4 of 4 models: 707-100B Short Body, 707-200, 707-100 Long Body, 707-100B Long Body
- [TCDS 4A26](https://openairdocs.org/tcds/4A26): The Boeing Company; names 4 of 4 models: 707-300B Series, 707-400 Series, 707-300 Series, 707-300C Series
- [TCDS A-618](https://openairdocs.org/tcds/A-618): The Boeing Company; names 4 of 4 models: DC3-G202A, DC3-G102A, DC3-G103A, DC3-G102
- [TCDS A28NM](https://openairdocs.org/tcds/A28NM): Airbus SAS; names 4 of 50 models: A320-111, A320-211, A320-212, A320-231
- [TCDS LTC-10](https://openairdocs.org/tcds/LTC-10): Lockheed Aircraft Corporation; names 4 of 4 models: P-38J (F-5E), P-38L (F-5F and F-5G), P-38E (Army), P-38M
- [TCDS 4A10](https://openairdocs.org/tcds/4A10): The Boeing Company; names 3 of 3 models: DC-7, DC-7C, DC-7B
- [TCDS 6A2](https://openairdocs.org/tcds/6A2): The Boeing Company; names 3 of 3 models: R4D-8Z, R4D-8, Super DC-3
- [TCDS 6A3](https://openairdocs.org/tcds/6A3): The Boeing Company; names 3 of 3 models: DC-6A, USAF C-118A, Navy R6D-1
- [TCDS A2NM](https://openairdocs.org/tcds/A2NM): The Boeing Company; names 3 of 4 models: 757-200CB Series, 757-200PF Series, 757-200 Series
- [TCDS ATC 683](https://openairdocs.org/tcds/ATC%20683): Lockheed Aircraft Corporation; names 3 of 3 models: 14-N2, 14-N3, 14-N
- [TCDS 4A28](https://openairdocs.org/tcds/4A28): The Boeing Company; names 2 of 2 models: 720B Series, 720 Series
- [TCDS 6A4](https://openairdocs.org/tcds/6A4): The Boeing Company; names 2 of 2 models: Navy R6D-1Z, DC-6B
- [TCDS A-726](https://openairdocs.org/tcds/A-726): The Boeing Company; names 2 of 2 models: SA-307B-1, SA-307B
- [TCDS A1NM](https://openairdocs.org/tcds/A1NM): The Boeing Company; names 2 of 5 models: 767-300 Series, 767-200 Series
- [TCDS A43NM](https://openairdocs.org/tcds/A43NM): Airbus SAS; names 2 of 8 models: A340-311, A340-211
- [TCDS A5EU](https://openairdocs.org/tcds/A5EU): Airbus SAS; names 2 of 2 models: BAC 1-11 200 Series, BAC 1-11 400 Series
- [TCDS ATC 657](https://openairdocs.org/tcds/ATC%20657): Lockheed Aircraft Corporation; names 2 of 2 models: 14-H2, 14-H
- [TCDS ATC 93](https://openairdocs.org/tcds/ATC%2093): Lockheed Aircraft Corporation; names 2 of 2 models: Vega 5, Vega 5-A Executive
- [TCDS TC 206](https://openairdocs.org/tcds/TC%20206): The Boeing Company; names 2 of 2 models: 80-A1, 80-A
- [TCDS TC 704](https://openairdocs.org/tcds/TC%20704): The Boeing Company; names 2 of 2 models: 314, A-314
- [TCDS 2A11](https://openairdocs.org/tcds/2A11): Lockheed Martin Aeronautics Company; names 1 of 1 models: 402-2
- [TCDS 4A17](https://openairdocs.org/tcds/4A17): Lockheed Martin Aeronautics Company; names 1 of 1 models: 1649A-98
- [TCDS A-723](https://openairdocs.org/tcds/A-723): Lockheed Martin Aeronautics Company; names 1 of 1 models: 18
- [TCDS A-781](https://openairdocs.org/tcds/A-781): The Boeing Company; names 1 of 1 models: DC-6
- [TCDS ATC 133](https://openairdocs.org/tcds/ATC%20133): The Boeing Company; names 1 of 1 models: 100
- [TCDS ATC 384](https://openairdocs.org/tcds/ATC%20384): Lockheed Aircraft Corporation; names 1 of 1 models: Vega 5-C (Army UC-101)
- [TCDS ATC 49 Lockheed](https://openairdocs.org/tcds/ATC%2049%20Lockheed): Lockheed Aircraft Corporation; names 1 of 1 models: Vega 1
- [TCDS ATC 52](https://openairdocs.org/tcds/ATC%2052): The Boeing Company; names 1 of 1 models: Super Universal
- [TCDS ATC 558](https://openairdocs.org/tcds/ATC%20558): The Boeing Company; names 1 of 1 models: 247-D (Army C-73)
- [TCDS TC 2-412](https://openairdocs.org/tcds/TC%202-412): The Boeing Company; names 1 of 1 models: 203-B
- [TCDS TC 551](https://openairdocs.org/tcds/TC%20551): Lockheed Aircraft Corporation; names 1 of 1 models: Electra 10-A (Army UC-36A; Navy R-20; and XR-20-1)
- [TCDS TC 584](https://openairdocs.org/tcds/TC%20584): Lockheed Aircraft Corporation; names 1 of 1 models: Electra 10-B (Navy R-30-1)
- [TCDS TC 590](https://openairdocs.org/tcds/TC%20590): Lockheed Martin Aeronautics Company; names 1 of 1 models: Electra 10-E
- [TCDS TC 616](https://openairdocs.org/tcds/TC%20616): Lockheed Aircraft Corporation; names 1 of 1 models: 12-A (Army UC-40; UC-40A; Navy JO-1; JO-2)
- [TCDS TC 719](https://openairdocs.org/tcds/TC%20719): The Boeing Company; names 1 of 1 models: S-307

## 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: 1,089 (1,089 by airframe model, 0 by engine model)
- Makers: Boeing 611, Mcdonnell Douglas 242, Douglas 109, Airbus Industrie 65, Lockheed 38, Airbus 18, Mcdonnell-Douglas 5, Lockheed Aircraft Intl 1

Models with the most aircraft:

- [Mcdonnell Douglas MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f): 100 aircraft (airframe model)
- [Boeing 757-232](https://openairdocs.org/model/boeing-757-232): 63 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-83(MD-83)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-83-md-83): 49 aircraft (airframe model)
- [Boeing 767-332](https://openairdocs.org/model/boeing-767-332): 46 aircraft (airframe model)
- [Boeing 757-224](https://openairdocs.org/model/boeing-757-224): 40 aircraft (airframe model)
- [Airbus Industrie A320-212](https://openairdocs.org/model/airbus-industrie-a320-212): 39 aircraft (airframe model)
- [Boeing 757-222](https://openairdocs.org/model/boeing-757-222): 38 aircraft (airframe model)
- [Boeing 767-322](https://openairdocs.org/model/boeing-767-322): 36 aircraft (airframe model)
- [Douglas DC3C-S1C3G](https://openairdocs.org/model/douglas-dc3c-s1c3g): 30 aircraft (airframe model)
- [Boeing 767-323](https://openairdocs.org/model/boeing-767-323): 27 aircraft (airframe model)
- [Boeing 757-223](https://openairdocs.org/model/boeing-757-223): 23 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-82(MD-82)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82-md-82): 22 aircraft (airframe model)
- [Boeing 757-236](https://openairdocs.org/model/boeing-757-236): 20 aircraft (airframe model)
- [Boeing 757-251](https://openairdocs.org/model/boeing-757-251): 18 aircraft (airframe model)
- [Lockheed 12A](https://openairdocs.org/model/lockheed-12a): 15 aircraft (airframe model)
- [Mcdonnell Douglas MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88): 14 aircraft (airframe model)
- [Boeing 757-231](https://openairdocs.org/model/boeing-757-231): 13 aircraft (airframe model)
- [Boeing 767-338](https://openairdocs.org/model/boeing-767-338): 13 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-87](https://openairdocs.org/model/mcdonnell-douglas-dc-9-87): 13 aircraft (airframe model)
- [Mcdonnell Douglas MD-10-30F](https://openairdocs.org/model/mcdonnell-douglas-md-10-30f): 13 aircraft (airframe model)

All 185 models: https://openairdocs.org/ad/93-14-12/models.md
Every aircraft: https://openairdocs.org/ad/93-14-12/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.