AC 135-45A

Advisory circular · Use of Noncertified Weather Observations in Noncontiguous States

Approved
January 15, 2026
Last reviewed
January 13, 2026
Cancels
AC135-45
Family
AC 135-45 · 2 versions
Revision
A
14 CFR parts
1, 91, 135
Cited by
1 AD

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed January 15, 2026.

Show pages 1–12

Appendix A A-3

5.1 Windspeed and direction.

5.2 Precipitation.

5.3 Altimeter settings/barometric pressure.

5.4 Thunderstorms.

6 Contingency Plans for Adverse Weather Conditions: Describe the procedures to be followed in case of deteriorating weather conditions or when noncertified weather information proves unreliable.

7 Emergency Procedures: Outline the emergency procedures in place for situations arising from the use of noncertified weather information.

B Pilot and Personnel Training and Qualifications 1 Pilot Training Curriculum on Noncertified Weather Information: Detail the specific training that pilots will receive on interpreting and using noncertified weather information.

2 Pilot Proficiency Checks:

2.1 Describe the evaluation methods used to assess pilot competency in using noncertified weather information.

2.2 Ensure the operator provides a procedure on how they determine the pilot in command (PIC) is current and qualified with special emphasis on instrument proficiency (14 CFR § 135.297).

3 Required Pilot Experience and Qualifications:

3.1 Specify the minimum experience and qualifications required for pilots operating under this program.

3.2 Ensure the PIC utilizing noncertified weather information has:

• 1,200 hours of total flight time,

• 100 hours of actual or simulated instrument aeronautical experience, and

• 75 hours of PIC in the make and model of aircraft being utilized.

Appendix A A-4

3.3 Ensure the second in command (SIC) (if required) utilizing noncertified weather information has at least 500 hours of total flight time, 50 hours of actual or simulated instrument aeronautical experience, or 250 hours of total flight time and 100 hours of supervised actual or simulated instrument aeronautical experience under the operator’s training program.

3.4 Recency of experience operating at the airport where noncertified weather information is applicable.

4 Training of the Human Observer (if applicable):

Identify the training curriculum provided to the human observer that includes equipment, training hours, and testing requirements. The training should describe the procedures the operator has established for weather identification when utilizing noncertificated weather information. (Refer to FAA Order 8900.1, Volume 3, Chapter 26, Section 8, Use of Noncertified Weather Observations in Noncontiguous States.)

C Safety Procedures 1 Description of Safety Management System (SMS): Provide an overview of the operator’s SMS or current work on implementation of 14 CFR part 5 requirements. If there is no SMS program, detail how hazard identification and associated risks are identified and mitigated as these operations are conducted.

2 Role of Noncertified Weather Information in SMS: Describe how the use of noncertified weather information fits into the overall SMS.

3 Safety Risk Assessment (SRA): Detail the assessment of potential risks associated with using noncertified weather information and the mitigation strategies in place.

4 Outline procedures for handling adverse weather conditions.

5 Describe contingency plans for weather-related diversions or emergencies (including communication between an observer, the pilot, and the company).

6 Explain how weather-related incidents will be reported and investigated.

Appendix A A-5 D Additional Information 1 Copies of pilot training program and curriculums and any associated checklists.

2 Copies of pilot and observer procedures as outlined in the operating manual.

3 Sample weather briefing forms or checklists.

4 Listing of airports that would be utilizing noncertificated weather information, the operational area, and any landmarks utilized by a human observer, from a weather camera, etc., to determine the approach minimums for the PIC to make a safe and competent decision on landing or departure.

5 Flight Risk Assessment.

E Supporting Documentation 1 Copies of pilot training records.

2 Weather equipment specifications and maintenance records.

3 Maps or charts depicting the operational area.

4 Any additional documentation supporting the application.

OMB Control Number: 2120-0746 Expiration Date:12/31/2027 Advisory Circular Feedback Form Paperwork Reduction Act Burden Statement: A federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a currently valid OMB Control Number. The OMB Control Number for this information collection is 2120-0746. Public reporting for this collection of information is estimated to be approximately 20 minutes per response, including the time for reviewing instructions, searching existing data sources, gathering, and maintaining the data needed, completing, and reviewing the collection of information.

All responses to this collection of information are voluntary. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to:

Information Collection Clearance Officer, Federal Aviation Administration, 10101 Hillwood Parkway, Fort Worth, TX 76177-1524.

If you find an error in this Advisory Circular, have recommendations for improving it, or have suggestions for new items/subjects to be added, you may let us know by emailing this form to the Air Transportation Division at 9-AFS-200-Correspondence@faa.gov or the Flight Standards Directives Management Officer at 9-AWA-AFB-120-Directives@faa.gov.

Subject: AC 135-45A, Use of Noncertified Weather Observations in Noncontiguous States Date: _____________________ Please mark all appropriate line items:

☐ An error (procedural or typographical) has been noted in paragraph ____________ on page _______.

☐ Recommend paragraph _____________ on page __________ be changed as follows:

☐ In a future change to this AC, please cover the following subject:

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Submitted by: Date: ______________________ FAA 1320-73 (01/25) SUPERSEDES PREVIOUS EDITIONS