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The "push-pull effect" and G-induced loss of consciousness accidents in the U.S. Air Force.
Aviat Space Environ Med. 1998 Nov; 69(11):1104-6.AS

Abstract

BACKGROUND

A recent Canadian Forces CF-18 Hornet aircraft accident has focused interest on the push-pull effect (PPE). PPE has not previously been identified in U.S. Air Force (USAF) G-Induced Loss of Consciousness (G-LOC) Accidents. The presence of maneuvers known to cause the push-pull effect (PPEMs) that lead to G-LOC accidents suggests that PPE is operationally significant and is a potential cause of G-LOC accidents.

METHODS

USAF accident reports where G-LOC was found to be causal were reviewed for indications of a PPEM immediately prior to the G-LOC. Terminology in the narratives was used to indicate a PPEM in the accident sequences.

RESULTS

In 3 of 24 mishaps, the presence of a PPEM was highly probable, while another 4 mishaps were found to have a probable association with PPEMs. The probable presence of PPEMs represents a significant percentage (12.5-29%) of USAF G-LOC accidents.

CONCLUSION

USAF G-LOC accident reports contained descriptions that indicated the presence of PPEMs in accident sequences. This finding suggests that the PPE is an operationally significant source of risk for accidents in USAF high-performance aircraft.

Authors+Show Affiliations

Michaud VJ
U.S. Air Force School of Aerospace Medicine, Brooks Air Force Base, TX 78235-5252, USA.
Lyons TJ
No affiliation info available

MeSH

AccelerationAccidents, AviationAerospace MedicineGravitationHumansMilitary PersonnelRisk FactorsUnconsciousnessUnited States

Pub Type(s)

Journal Article

Language

eng

PubMed ID

9819170

Citation

Michaud, V J., and T J. Lyons. "The "push-pull Effect" and G-induced Loss of Consciousness Accidents in the U.S. Air Force." Aviation, Space, and Environmental Medicine, vol. 69, no. 11, 1998, pp. 1104-6.
Michaud VJ, Lyons TJ. The "push-pull effect" and G-induced loss of consciousness accidents in the U.S. Air Force. Aviat Space Environ Med. 1998;69(11):1104-6.
Michaud, V. J., & Lyons, T. J. (1998). The "push-pull effect" and G-induced loss of consciousness accidents in the U.S. Air Force. Aviation, Space, and Environmental Medicine, 69(11), 1104-6.
Michaud VJ, Lyons TJ. The "push-pull Effect" and G-induced Loss of Consciousness Accidents in the U.S. Air Force. Aviat Space Environ Med. 1998;69(11):1104-6. PubMed PMID: 9819170.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The "push-pull effect" and G-induced loss of consciousness accidents in the U.S. Air Force. AU - Michaud,V J, AU - Lyons,T J, PY - 1998/11/18/pubmed PY - 1998/11/18/medline PY - 1998/11/18/entrez SP - 1104 EP - 6 JF - Aviation, space, and environmental medicine JO - Aviat Space Environ Med VL - 69 IS - 11 N2 - BACKGROUND: A recent Canadian Forces CF-18 Hornet aircraft accident has focused interest on the push-pull effect (PPE). PPE has not previously been identified in U.S. Air Force (USAF) G-Induced Loss of Consciousness (G-LOC) Accidents. The presence of maneuvers known to cause the push-pull effect (PPEMs) that lead to G-LOC accidents suggests that PPE is operationally significant and is a potential cause of G-LOC accidents. METHODS: USAF accident reports where G-LOC was found to be causal were reviewed for indications of a PPEM immediately prior to the G-LOC. Terminology in the narratives was used to indicate a PPEM in the accident sequences. RESULTS: In 3 of 24 mishaps, the presence of a PPEM was highly probable, while another 4 mishaps were found to have a probable association with PPEMs. The probable presence of PPEMs represents a significant percentage (12.5-29%) of USAF G-LOC accidents. CONCLUSION: USAF G-LOC accident reports contained descriptions that indicated the presence of PPEMs in accident sequences. This finding suggests that the PPE is an operationally significant source of risk for accidents in USAF high-performance aircraft. SN - 0095-6562 UR - https://www.unboundmedicine.com/medline/citation/9819170/The_"push_pull_effect"_and_G_induced_loss_of_consciousness_accidents_in_the_U_S__Air_Force_ L2 - https://medlineplus.gov/veteransandmilitaryhealth.html DB - PRIME DP - Unbound Medicine ER -