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NAOMS Air Carrier Survey Responses
12.31.07
 
NOTE: The responses contained herein, and the methodology used to acquire them, have not been peer-reviewed to date. Accordingly, no product of the NAOMS project, including the survey methodology, the survey responses, and any analysis of the responses, should be viewed or considered at this stage as having been validated.

Air Carrier Survey Questionnaire (Added Feb. 6, 2008)
The survey used during interviews with air carrier pilots. The question numbers contained within the survey correspond to the column headings in the survey response files.

The survey responses are available in both Adobe Acrobat PDF format and Microsoft Office Excel format.

Air Carrier Survey Responses (25,105)*
  • Section A– A set of responses to questions relating to pilot operating experience during the recall period and during the pilot’s total career -- PDF Format or Excel Format.
  • Section B (Updated Feb. 6, 2008)* – a set of responses to questions designed to capture recent safety-related flight experiences. Section B was designed to generate multi-year longitudinal measurements of national aviation system safety incidents -- PDF Format or Excel Format.
  • Section C– a set of responses to focused questions on a topic of particular interest to NAOMS. Further details on Section C can be found in the NAOMS Reference Report.
    • Section C JIMDAT– a set of responses to questions regarding baseline aviation system performance measures requested by a government-industry group, Commercial Aviation Safety Team (CAST) Joint Implementation Measurement Data Analysis Team (JIMDAT) -- PDF Format or Excel Format.
    • Section C ICAC (Updated Feb. 6, 2008)* – a set of responses to questions regarding "in-close" changes to approach and landing clearances (ICACs) -- PDF Format or Excel Format.
  • Section D– a set of responses to questions designed to elicit respondent feedback on the interview experience. Note: The responses to free text narrative questions D3A and D5 were disaggregated from the parent surveys and were subsequently randomized -- PDF Format or Excel Format.
* Updates to Sections B and C ICAC corrected errors found in several column totals after the Dec. 31, 2007 posting.

NOTE: Prior to the recent redaction steps taken, NAOMS air carrier survey responses were evaluated by Battelle at two stages. During initial processing, Battelle refined the set of survey responses using the Chebyshev process and related criteria to remove 322 responses of doubtful quality to avoid contaminating analyses of the responses. Battelle cites the following specific reasons for their removal: 1) number of flight hours too small; 2) unreasonable ratio of hours-to-legs; 3) unreasonable responses to multiple questions; and/or 4) Section B not completed. These responses are provided below and are identified as the “Outlier Survey Responses.” A second refinement was then made by Battelle during subsequent tabulation activities when the NAOMS project team sought a set of responses with all explanatory flight activity variables present (no null values in Section A fields). This was done to ensure that all tabulations on the responses based on flight activity fields had a consistent total. This resulted in an additional 335 responses being removed. These responses are provided below, identified as the "Survey Responses with Unknowns in Flight Activity Fields."

Air Carrier Outlier Survey Responses (322) (Sections A-C Added, and Section D Updated, Feb. 6, 2008)
Air Carrier Survey Responses with Unknowns in Flight Activity Fields (335)
Partial Raw Air Carrier Survey Responses (25,105) (Updated Feb. 6, 2008) -- PDF Format or Excel Format
This file contains a portion of the actual or raw responses collected in Section A of the air carrier surveys to show the breadth and scope of the pilot community surveyed and the types of aircraft flown. The fields represented in this file are the career flight hours, the flight hours and flight legs during the recall period, and the various make-model-series of aircraft flown during the recall period along with the percentage of flight time on each. These fields were disaggregated from the parent survey responses and were subsequently randomized. The fields for flight hours and flight legs were maintained as a set when randomized.

Partial Raw Air Carrier Outlier Survey Responses (322) (Added Feb. 6, 2008) – PDF Format or Excel Format
This file contains a portion of the actual or raw responses collected in Section A of the air carrier surveys to show the breadth and scope of the pilot community surveyed and the types of aircraft flown. The fields represented in this file are the career flight hours, the flight hours and flight legs during the recall period, and the various make-model-series of aircraft flown during the recall period along with the percentage of flight time on each. These fields were disaggregated from the parent survey responses and were subsequently randomized. The fields for flight hours and flight legs were maintained as a set when randomized.

Misfiled Air Carrier Survey Responses (407) (Added Feb. 6, 2008)
Responses for an additional 407 misfiled surveys discovered on December 27, 2007.
**The 407 misfiled survey responses, the 322 outlier survey responses, and the 335 survey responses with unknowns in the flight activity field did not contain any Section C JIMDAT information.

Partial Raw Misfiled Air Carrier Survey Responses (407) (Added Feb. 6, 2008) -- PDF Format or Excel Format

This file contains a portion of the actual or raw responses for an additional 407 surveys discovered on December 27, 2007. The raw responses were collected in Section A of the air carrier surveys to show the breadth and scope of the pilot community surveyed and the types of aircraft flown. The fields represented in this file are the career flight hours, the flight hours and flight legs during the recall period, and the various make-model-series of aircraft flown during the recall period along with the percentage of flight time on each. These fields were disaggregated from the parent survey responses and were subsequently randomized. The fields for flight hours and flight legs were maintained as a set when randomized.

NOTE: Users of this NAOMS web site will not find a "Partial Raw Air Carrier Unknowns Survey Response" section for the set of 335 unknowns survey records. The set of unknowns consist of reports that had been excluded from the larger set of 25,105 Air Carrier data because they were missing key data from one or more Section A demographics fields that are needed as explanatory variables for the safety events sections (A, B, C ICAC, and C JIMDAT) that follow. A Partial Raw Air Carrier Unknowns Survey Response section prepared from the sparse Section A data from the unknowns records would be of limited utility.

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