# D&G Consulting, Inc — Hazardous Materials Safety Interpretation

**Citation:** 02-0204  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2002-10-02

02-0204 response to D&G Consulting, Inc concerning 173.166.

## Document text

<<<PAGE 1>>>

of Transportation
U.S. Department
ОСТ 2 2002
400 Seventh St., S.W.
Research and
Washington, D.C. 20590
Special Programs
Administration
Mr. Glen K. Wanczyk
Hazardous Materials Consultant
Ref. No. 02-0204
D&G Consulting, Inc.
Bountiful,
3708 South Monarch Drive
Utah 84010
Dear Mr. Wanczyk:
This responds to your letter concerning exceptions accorded to
the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) .
air bag modules that are installed in completed components under
Specifically, you inquire whether a completed aircraft seat
the requirements of the HMR under $ 173.166 (d).
assembly containing an approved air bag module is excepted from
pretensioner that is installed in an aircraft or completed
The answer is yes. An approved air bag module or seat-belt
$ 173.166 (d)
aircraft component (e.g., seat assembly) meets the intent of
and, therefore, is not subject to the HMR.
be of further assistance.
I trust this satisfies your inquiry. Please contact us if we can
Sincerely,
Holle 2. Michelp
Chief,
Hattie I. Mitchell
Office of Hazardous Materials Standards
Regulatory Review and Reinvention
НІННИН
173,166(d)
020204

<<<PAGE 2>>>

Stevens
Glen K. Wanczyk
D & G Consulting, Inc.
8173.166 (d)
3708 South Monarch Drive
Bountiful, Utah 84010
Airbags
801-295-3850
Fax 801-294-0461
02-0204
July 24, 2002
ssociate Administrator
esearch and Special Program
400 Seventh Street SW Room 8422
U.S. Department of Transportation
Washington, D.C. 20590-0001
Attention:
Mr. Edward Mazzullo
Director, Office of Hazardous Materials Standards
Subject:
DOT Interpretation
Dear Mr. Mazzullo,
Please advise if you agree that the above-described scenario meets the intent of Title 49
completed aircraft components" need to be included into the above CFR provision.
CFR 173.166(d). Also, please advise what action is required if the words "aircraft or
Thank you in advance for your help and cooperation in this most important matter.
Glen K. Wanczyk
Hazardous Materials Consultant

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2002/020204.pdf>
- Source ID: `phmsa`
- SHA-256: `01f69a93b13a6500ab162606da8395c02eb400f01ffcc66d16a6b0934e7709d7`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T22:28:08.031Z
- Document slug: `phmsa-interpretation-02-0204`

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