# US Airways — Hazardous Materials Safety Interpretation

**Citation:** 00-0063  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2000-03-03

00-0063 response to US Airways concerning 173.301.

## Document text

<<<PAGE 1>>>

r
f Transportatior
S. Departmen
was Siegion, SC 2059
2059(
MAR - 3 2000
Ms. Zoe Abdul
Maintenance, Quality Assurance
Ref. No. 00-0063
US Airways
Dear Ms. Abdul:
This is in response to your letter dated February 22, 2000
regarding the transportation of compressed oxygen cylinders
aboard aircraft.
oxygen cylinders may be transported aboard an aircraft in an
Specifically, you ask if partially filled
ATA Specification 300 outer packaging.
The Hazardous Materials Regulations (49 CFR Parts 171-180) do
not specify a minimal fill limit when transporting cylinders
of compressed gas, including compressed oxygen. Therefore, it
is the opinion of
of compressed oxygen may be transported aboard an aircraft in
this Office that partially filled cylinders
an ATA 300 Specification outer packaging.
I hope this satisfies your request.
Sincerely,
Thome. Allan
Thomas G. Allan
Senior Transportation Regulations Specialist
Office of Hazardous Materials
Standards
000063

<<<PAGE 2>>>

158-25-2000 10:37
US AIRWAYS MTC. QA
4127473931
P.02/02
U-S AIRWAYS
February 22, 2000
Edward Mazzullo
Director for Office of Hazardous Material Standards
US DOT / RSPA (DHM10)
4007St. SW
Washington DC 20590-0001
Subject: Transportation of Crew Oxygen Bottles
Dear Mr. Mazzullo:
This is in regards to the transportation of compressed oxygen bottles. According to the
transport effective March 1, 2000.
ATA spec 300, it requires these bottles be packaged in a hard case container for air
In regards to this policy, a concern at US Airways is that when we transport compressed
oxygen bottles in the approved packaging, can the bottles be partially filled? Are there
any requirements or limitations on this issue?
I wish to receive a formal written response from your office on this matter at your earliest
convenience. A fax response is acceptable to 412-747-3975. Your time and effort in
addressing this matter is very much appreciated. Thank you in advance.
Sincerely,
‚oe Abdul
412-747-3185
Maintenance, Quality Assurance Auditor
TOTAL P.02

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2000/000063.pdf>
- Source ID: `phmsa`
- SHA-256: `bc94cfb463b16da91e03be20672b4b1bc11a43308bbba7c00894c2ffe1cc4b5b`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T22:27:46.419Z
- Document slug: `phmsa-interpretation-00-0063`

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